growth ring

短语

[化] 年轮

词形变化

growth rings 复数 growth rings

1.

A circular structure that forms as a living thing ages that is used or counted to estimate the age of the living thing.
2.

A circular structure that forms as a living thing ages that is used or counted to estimate the age of the living thing.

Any of the concentric rings formed in the trunk of a tree by the annual growth of wood.

名词