tree ring
tree ring — 名詞
1. one of the circular layers of wood inside a tree's trunk, where a fresh layer is
年輪
樹幹中每年生長形成的一圈圈紋路
one of the circular layers of wood inside a tree's trunk, where a fresh layer is added every year, so counting the rings reveals the tree's age
The forester counted the tree rings to learn how old the oak was.
那位林務員數年輪，想知道那棵橡樹有多老。
count the tree rings to find a tree's age
Each summer of heavy rain leaves a wider tree ring in the wood.
每逢多雨的夏天，木頭裡就會留下較寬的一圈年輪。
a wider tree ring marks a wet growing year
Heloísa photographed the pale tree rings on the freshly cut pine stump.
Heloísa 拍下剛鋸開的松樹樹樁上淡色的年輪。
Scientists study tree rings to track droughts from hundreds of years ago.
科學家研究年輪，藉此追蹤數百年前的乾旱。
After the storm fell the maple, Kofi traced its tree rings with one finger.
暴風雨吹倒楓樹後，Kofi 用一根手指撫過它的年輪。
- annual ring
more technical botanical term for the same yearly band
- growth ring
broader term; also covers similar rings in shells and horns
用法筆記
Usually plural (tree rings) when the point is counting them to date a tree or read past weather; the singular names just one band of growth.