deep notch

• 深槽

deep notch的用法和样例：

例句

1. Deep grooves channelled the soft rock.
   在软岩石上形成许多深槽。
2. I was more than halfway down when I came upon a deep funnel shaped formation in my path.
   下达大半程的时候，前面突然出现一个漏斗形的深槽。