reef

The Great Barrier Reef is home to thousands of species of colorful fish and marine life.

(Chinese) 大堡礁是数千种色彩斑斓的鱼类和海洋生物的家园。

Sailors must be careful, as the hidden reef can easily tear a hole in the bottom of a ship.

(Chinese) 水手们必须小心，因为隐藏的暗礁很容易在船底撞出一个大洞。