seasonal ring

• 年轮

seasonal ring的用法和样例：

例句

1. The ring near the bark is the biggest one of all.
   离树皮最近的年轮是当中最大的。
2. Northeastbirch is tawny, growth ring slightly obvious.Shiny wood,straight texture, fine structure and uniformity, poor hardness.
   东北桦呈黄褐色，生长年轮略明显，木材有光泽，纹理直，结构细而均匀，但硬度稍差。