tree的用法总结（共19篇）由网友“望月亮的凡人”投稿提供，下面是小编收集整理的tree的用法总结，供大家参考借鉴，欢迎大家分享。
篇1：tree的用法总结
tree的意思
n. 树,木料,树状图,宗谱
vt. 把…赶上树,使处于困境,把鞋型插入(鞋内)
变形：过去式: treed; 现在分词：treeing; 过去分词：treed;
篇2：tree的用法总结
tree可以用作名词
tree的基本意思是“树”,是木本植物的统称,尤指树干高大、主干与分枝有很明显区别的木本植物,即乔木。用于比喻,可指“树形图”“谱系图”等。
tree用作名词的用法例句
We plant trees and flowers in spring.我们在春天种花种树。
In the storm I took shelter under the tree.暴风雨时，我正在树下躲避。
She sat very still under the tree.她在树底下静静地坐着。
篇3：tree的用法总结
1、He sees himself going right to the top of the tree.
他预见自己在同行中将无人可及。
2、He was a huge man, built like an oak tree.
他是个大块头，结实得像棵橡树。
3、To avoid damaging the tree, hammer a wooden peg into the hole.
为了不毁坏树，用锤子将一个木栓钉进洞里。
in the tree &on the tree 深入辨析
1.in the tree
In the tree 表示的在树上指的是原本不在树上的物体，例如：鸟，猫等小动物，物品及人。
There are some birds in the tree.
树上有一些鸟。
The kitty is in the tree.
那个小猫在树上。
2.on the tree
On the tree表示原本在树上的东西，比如树枝、树叶、花、果实等。另外，其他一些明显位于树木表面，但不属于数本身的东西，也用on the tree。
There are some pears on the tree.
树上结了一些梨。
Those flowers on the tree come out.
树上的花开了。
小练习：
Look at the monkey,it is_____.
In the tree on the tree
There are many green leaves ____.
In the tree on the tree
答案：in the tree; on the tree
你一定不知道，“tree”还有这么多用法!
Bark up the wrong tree
冲着不是目标的树汪汪叫
含义: 在不对的地方寻找;弄错了的目标。
John wanted me to get him a job. He's barking up the wrong tree. I don't have that kind of power at my office.
约翰要我帮他找份工作，但他找错了人。我在办公室里没有那么大权力。
2Knock on wood
敲木头
含义: 指一种用敲木头来求好运的迷信行为。
I'm hoping to get a promotion this month. Knock on wood!
我希望这个月获得晋升。求好运!
Out on a limb
出来站到枝干上
含义: 冒险，让自己处于有风险的境地。
Last year, he went out on a limb and quit his job to open a small restaurant.
去年，他冒险辞去工作开了一家小餐厅。
4Can't see the forest for the trees
只见树木不见森林
含义: 无法看清整体或大局。
Yuki is very detail-oriented, but she is not able to see the forest for the trees.
尤姬非常注重细节，但她没法看清大局。
The apple doesn't fall far from the tree
苹果掉不到离树太远的地方
含义: 有其父(母)必有其子(女)。
Jenna's mother is a surgeon, and her father is also a doctor. Jenna will graduate from medical school next year. The apple doesn't fall far from the tree!
詹娜的母亲是外科医生，父亲也是医生。詹娜明年会从医学院毕业。真是有什么样的父母就有什么样的女儿!
6Out of the woods
走出树林
含义: 摆脱困境。
Fortunately, the economy is better, and my business is doing well now. I'm out of the woods.
我的生意好几个月都了赔钱，我曾想关张。但幸运的是，随着经济好转，我现在的生意不错。我已走出困境。
篇4：tree的用法和短语例句
用作名词 (n.)
bark up the wrong tree
把某事物搞错了,错怪了人
grow on trees
多,易获得等
篇5：tree的用法和短语例句
1. He sees himself going right to the top of the tree.
他预见自己在同行中将无人可及。
2. He was a huge man, built like an oak tree.
他是个大块头，结实得像棵橡树。
3. To avoid damaging the tree, hammer a wooden peg into the hole.
为了不毁坏树，用锤子将一个木栓钉进洞里。
4. The following summer the peach tree was laden with fruit.
第二年夏天桃树就结满了桃子。
5. The driver failed to negotiate a bend and ran into a tree.
司机没能顺利拐弯，撞到了树上。
6. A vandal with a chainsaw cut down a tree.
一个故意破坏公物的人用链锯伐倒了一棵树。
7. He started to hack away at the tree bark.
他开始砍树皮。
8. A thrush alighted on a branch of the pine tree.
一只鸫落在松树的树枝上。
9. Jose, as usual, had climbed a tree to keep watch.
乔斯像往常一样爬到树上放哨。
10. This tree is always recognizable by its extremely beautiful silvery bark.
这种树很容易辨认，因为它有着非常漂亮的银色树皮。
11. You are absolutely correct. The leaves are from a bay tree.
你说得很对，这是月桂树的叶子。
12. If the soil is allowed to dry out the tree could die.
如果任由土壤变干，这棵树可能会枯死。
13. The tree's roots are stripped and hung to season and bleach.
树根剥皮后挂起来风干晒白。
14. Every tree, wall and fence stood out against dazzling white fields.
每棵树、每堵墙和每道栅栏都在白得耀眼的田野映衬下十分夺目。
15. The wolf clawed at the tree and howled the whole night.
这匹狼用爪子挠着树，嚎叫了整晚。
篇6：An Apple Tree
An Apple Tree
a long time ago, there was a huge apple tree. a little boy loved to come and lay around it every day. he climbed to the tree top, ate the apples, took a nap under the shadow… he loved the tree and the tree loved to play with him.
time went by… the little boy had grown up and he no longer played around the tree every day. one day, the boy came back to the tree and he looked sad. “come and play with me,” the tree asked the boy. “i am no longer a kid, i don't play around trees anymore.” the boy replied, “i want toys. i need money to buy them.” “sorry, but i don't have money…but you can pick all my apples and sell them. so, you will have money.” the boy was so excited. he grabbed all the apples on the tree and left happily. the boy never came back after he picked the apples. the tree was sad.
one day, the boy returned and the tree was so excited. “come and play with me,” the tree said. “i don't have time to play. i have to work for my family. we need a house for shelter. can you help me?” “sorry, but i don't have a house. but you can chop off my branches to build your house.” so the boy cut all the branches off the tree and left happily. the tree was glad to see him happy but the boy never came back since then. the tree was again lonely and sad.
one hot summer day, the boy returned and the tree was delighted. “come and play with me!” the tree said. “i am sad and getting old. i want to go sailing to relax myself. can you give me a boat?” “use my trunk to build your boat. you can sail far away and be happy.” so the boy cut the tree trunk to make a boat. he went sailing and never showed up for a long time. the tree was happy, but it was not true.
finally, the boy returned after he left for so many years. “sorry, my boy. but i don't have anything for you anymore. no more apples for you…” the tree said.
“i don't have teeth to bite,” the boy replied.
“no more trunk for you to climb on.”
“i am too old for that now,” the boy said.
“i really can't give you anything… the only thing left is my dying roots,” the tree said with tears.
“i don't need much now, just a place to rest. i am tired after all these years.” the boy replied.
“good! old tree roots is the best place to lean on and rest. come, come sit down with me and rest.” the boy sat down and the tree was glad and smiled with tears…
this is a story of everyone. the tree is our parent. when we were young, we loved to play with mom and dad… when we grown up, we left them, and only came to them when we need something or when we are in trouble. no matter what, parents will always be there and give everything they could to make you happy. you may think that the boy is cruel to the tree but that's how all of us are treating our parents.
篇7：The Christmas Tree
Although it is generally agreed that the Christmas tree in its current form came from Germany in the early 19th century, the tradition of decorating a tree to mark winter celebrations dates back hundreds of years to Roman times, when they used to decorate evergreen trees with small pieces of metal to celebrate Saturnalia.
In medieval times the 'Paradise Play' was performed every year on 24 December. This depicted the creation of Man and the fall of Adam and Eve from the Garden of Eden and always included an evergreen hung with apples which represented the apple tree of temptation.
There is a legend that St Boniface, an English monk, came upon a group of pagans gathered around an oak tree who were preparing to sacrifice a child to the God Thor. In order to stop the sacrifice, and save the child's life, St Boniface is said to have felled the tree with one blow of his fist. Later on, a fir tree grew in place of the oak and this, St Boniface told the pagans, was the Tree of Life and represented the Christ Child.
Legend also suggests that, in the late 16th century, Martin Luther (the founder of the Protestant religion) was the first to decorate an indoor tree with candles when he attempted to recreate the stars shining over a forest of evergreens.
The first mention of decorated trees being taken indoors came in 1605 in Germany - a country with a long Christmas tree history! The trees were initially decorated with fruit and sweets together with hand made objects such as quilled snowflakes and stars. German Christmas Markets began to sell shaped gingerbreads and wax ornaments which people bought as souvenirs of the fair and took home to hang on their tree.
Tinsel was also invented in Germany in about 1610. Up until fairly recently real silver was used, which was pulled into wafer thin strips by special machines. This was durable but tarnished quickly and many experime
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篇8：An Apple Tree
An Apple Tree
A long time ago, there was a huge apple tree. A little boy loved to come and lay around it every day. He climbed to the tree top, ate the apples, took a nap under the shadow… He loved the tree and the tree loved to play with him.
Time went by… the little boy had grown up and he no longer played around the tree every day. One day, the boy came back to the tree and he looked sad. “Come and play with me,” the tree asked the boy. “I am no longer a kid, I don't play around trees anymore.” The boy replied, “I want toys. I need money to buy them.” “Sorry, but I don't have money…but you can pick all my apples and sell them. So, you will have money.” The boy was so excited. He grabbed all the apples on the tree and left happily. The boy never came back after he picked the apples. The tree was sad.
One day, the boy returned and the tree was so excited. “Come and play with me,” the tree said. “I don't have time to play. I have to work for my family. We need a house for shelter. Can you help me?” “Sorry, but I don't have a house. But you can chop off my branches to build your house.” So the boy cut all the branches off the tree and left happily. The tree was glad to see him happy but the boy never came back since then. The tree was again lonely and sad.
One hot summer day, the boy returned and the tree was delighted. “Come and play with me!” the tree said. “I am sad and getting old. I want to go sailing to relax myself. Can you give me a boat?” “Use my trunk to build your boat. You can sail far away and be happy.” So the boy cut the tree trunk to make a boat. He went sailing and never showed up for a long time. The tree was happy, but it was not true.
Finally, the boy returned after he left for so many years. “Sorry, my boy. But I don't have anything for you anymore. No more apples for you…” the tree said.
“I don't have teeth to bite,” the boy replied.
“No more trunk for you to climb on.”
“I am too old for that now,” the boy said.
“I really can't give you anything… the only thing left is my dying roots,” the tree said with tears.
“I don't need much now, just a place to rest. I am tired after all these years.” The boy replied.
“Good! Old tree roots is the best place to lean on and rest. Come, Come sit down with me and rest.” The boy sat down and the tree was glad and smiled with tears…
This is a story of everyone. The tree is our parent. When we were young, we loved to play with Mom and Dad… When we grown up, we left them, and only came to them when we need something or when we are in trouble. No matter what, parents will always be there and give everything they could to make you happy. You may think that the boy is cruel to the tree but that's how all of us are treating our parents.
篇9：The Cherry Tree
The Cherry Tree
One afternoon, a close friend of mine came up to me excitedly:
“Julia, don't you know that there's a cherry tree in our school?”
“A cherry tree? Really? Where?”
Cherry trees were so scarce that I had only seen them in the film “Romantic Cherry”.
“In Xi Garden. Hurry! Let's go and see it!”
I dropped my book and followed my friend out of the class
As soon as I stepped into Xi Garden, I began seeking the precious “pink” eagerly. And ho, there it was! In the distance,several pink “clouds” were floating above a small pavilion. That was it! My cherry tree!
We quickened our steps. Little by little, the gossamer like pink “clouds” grew bigger and bigger and at last seemed to occupy the blue sky when we were just standing under the cherry, on a small slope. Beneath my feet, the soil was covered by fallen petals. What a wonderful experience! Stretching my arms widely, I felt as if flying in the air weightlessly in the world of pink.
When a gentle breeze passed by, hundreds of petals parachuted down. They danced and whirled beautifully in the air and blurred my vision. The petals were so light that it took them some time to fall down onto the ground or into the pool.
The petals lying on the ground joined their brothers and sisters to extend a pink carpet while those floating on the water were setting out on a mysterious journey.
“I surely will be sorry when all of the petals have fallen down.” My friend said woefully.
“No. Although they have left their home and have been separated from each other, they are still happy and composed and try to do their best where God place them.” I said to myself,firmly and hopefully.
简 评
本文描写了樱桃树开花的美景和作者喜悦的心情。呈现在作者眼前的是一个粉红色的世界：头顶上漂浮着粉红色的“云彩”，脚下粉红色的花瓣覆盖着大地。作者对花瓣飘落的描写非常精彩：hundreds“petals parachuted down;They danced and whirled beautifully Intheair，使读者仿佛身临其境。在作者笔下，这些花瓣都有了生命的灵气：落在地上的花瓣合力展开一块粉色的地毯，而落在水中的花瓣开始了它们的`神秘之旅。
最后一段点明了作者对落花纷纷的理解：不管身处何地，都要力求做的最好。这一理解非常富有哲理，令人不禁想起了“落花不是无情物，化作春泥更护花”的诗句。
(点评教师：黄莺)
篇10：POJ1308――Is It A Tree?
Is It A Tree?Time Limit:1000MSMemory Limit:10000KTotal Submissions:22631Accepted:7756
Description
A tree is a well-known data structure that is either empty (null, void, nothing) or is a set of one or more nodes connected by directed edges between nodes satisfying the following properties.There is exactly one node, called the root, to which no directed edges point.
Every node except the root has exactly one edge pointing to it.
There is a unique sequence of directed edges from the root to each node.
For example, consider the illustrations below, in which nodes are represented by circles and edges are represented by lines with arrowheads. The first two of these are trees, but the last is not.
In this problem you will be given several descriptions of collections of nodes connected by directed edges. For each of these you are to determine if the collection satisfies the definition of a tree Z?www.2cto.com/kf/ware/vc/“ target=”_blank“ class=”keylink“>vciBub3QuCgo8cCBjbGFzcz0=”pst“>Input
The input will consist of a sequence of descriptions (test cases) followed by a pair of negative integers. Each test case will consist of a sequence of edge descriptions followed by a pair of zeroes Each edge description will consist of a pair of integers; the first integer identifies the node from which the edge begins, and the second integer identifies the node to which the edge is directed. Node numbers will always be greater than zero.Output
For each test case display the line ”Case k is a tree.“ or the line ”Case k is not a tree.“, where k corresponds to the test case number (they are sequentially numbered starting with 1).Sample Input
6 8 5 3 5 2 6 45 6 0 08 1 7 3 6 2 8 9 7 57 4 7 8 7 6 0 03 8 6 8 6 45 3 5 6 5 2 0 0-1 -1
Sample Output
Case 1 is a tree.Case 2 is a tree.Case 3 is not a tree.
Source
判断一些点形成的结构是否是一棵树，坑点好多，用并查集判断连通支数以及环，判断每个点的入度，判断是否有自己连向自己的边
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