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。

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An increment borer is used to determine the age of a tree.

增量螟虫是用来确定树龄的一个。

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An increment borer is used to determine the age of a tree.

增量螟虫是用来确定树龄的一个。

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