reef

US /riːf/
UK /riːf/
"reef" picture
1.

礁, 暗礁

a ridge of rocks or sand, often of coral, near the surface of the sea

:
The ship ran aground on the coral reef.
船在珊瑚上搁浅了。
Divers explored the vibrant marine life around the reef.
潜水员们探索了礁石周围充满活力的海洋生物。
1.

收帆, 缩帆

reduce the area of (a sail) by folding or rolling part of it and securing it to the spar or mast

:
The sailors had to reef the sails as the storm approached.
随着暴风雨的临近,水手们不得不收帆
We decided to reef the main sail to reduce speed.
我们决定收起主帆以降低速度。