Tree rings are made of tissue called xylem.
构成年轮的组织被称为木质部。
Looking at the tree rings is more important.
在树木年轮看更重要。
Tree rings are the obvious, and most controversial, example.
树的年轮是最明显但又最有争议性的一个例子。
To study tree rings, researchers generally take a pencil-sized core from a tree.
为了对年轮进行研究，研究人员通常会从树木取出一块铅笔大小的核心部分。
The tree people in the Lord of the Rings—the Ents—can get around by walking.
《指环王》里的树形人，即树精，可以四处走动。
We can tell the age of a tree from its growth rings.
大树的年龄，告诉我们它的成长过程。
The growth rings on a tree tell him.
这就是树木的年轮告诉他的。
If a tree becomes old it will leave circuits of growth rings.
树老了，会留下一圈圈的年轮。
If a tree becomes old it will leave circuits of growth rings.
树老了，会留下一圈圈的年轮。
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