四周既不长草，也没有树。
But there are still some other lands bare of grasses or trees on the earth.
但是地球上仍然有一些土地很荒芜。
To stay safe, do not stand under trees, on hills or near water.
安全起见，不要站在树下、山上或水边。
They're always protesting about something or saving the trees or whatever.
他们总是在抗议一些事情，或是在拯救树木或诸如此类的事情。
Already 4 million trees have been felled or marked for destruction.
已经有4百万棵树被砍伐或是标记要毁掉的。
Also try to reduce the message tree copies or creating new message trees.
还要尝试减少消息树副本或创建新消息树。
Do people gather oranges from apple trees, or grapes from an oak tree.
人们可否从苹果树上收取柑橘，或者从橡树上收取葡萄？
He can be found alone in the trees for an hour or two every morning.
每天早上，他都在树林里一个人独自练习一两个小时。
However some live or travel through polluted regions with few trees to provide oxygen.
可是一些人旅行经过或居住在极少树木提供氧气的污染地带。
No matter whether I will be tall and straight trees, or low shrubs.
将来无论我会成为挺拔的乔木，还是低矮的灌木。
However, carbon is released when trees die or burn.
然而，当树木死亡或燃烧时，则会释放出碳元素。
Timber companies cut down trees and turn them into furniture or paper productions.
木材公司用树木来制作家具或是各类纸制品。
Or, even better, print them out on paper, the kind made from trees.
或者更好的办法是，用树木做成的纸张将它们打印出来。
You can easily see football matches or you can pick apples from apple trees.
你可以轻易的看见足球比赛或是从苹果树上摘苹果。
Construct vocabulary trees from short stories or articles you are reading.
通过阅读短篇小说或文章构建词汇树形表。
What the relationship between trees, flowers, or human being?
人类和树木、花是什么样的一种关系…
For example, trees can be very round or triangular in shape.
例如，树木的形状可能非常浑圆或是明显的三角形。
Lots of trees were blown down. Worse still, some people were killed or injured.
许多树被风刮倒了。更糟糕的是，还死伤了一些人。
In the past, there were no trees left in or around the village.
过去，村子里里外外没剩下一棵树。
Or Chase after leaves That fall from the trees.
或者追逐那些从树上落下的树叶吗。
In the past no trees were left in or around the village.
过去这个村子及周围没剩下一棵树。
Please be careful not to damage trees and plants or pick flowers.
请警惕，不要损坏树木和动物或采摘花朵。
There are not enough trees, water, oil, fish, animals, or clean air for our future.
我们将来就没有足够的树、水、油、鱼、动物和清洁的空气。
Old spirit houses are often left by sacred trees or at wats.
老精神房子由神圣的树经常离开或在。
They are usually too lazy or too careless to plant and look after new trees.
他们通常是懒惰的植物，或是太不小心照顾新树。
All tea trees in other countries have their origin directly or indirectly in China.
其他国家种植的茶直接或间接地起源于中国。
Given two binary trees, write a function to check if they are equal or not.
题目大意：给定两个二叉树，判断两者是否是相同的二叉树。即结构相同且对应节点的值也相同。
Given two binary trees, write a function to check if they are equal or not.
题目大意：给定两个二叉树，判断两者是否是相同的二叉树。即结构相同且对应节点的值也相同。
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