reef

• 名词，有两个主要意思：一是指靠近水面的由岩石、沙或珊瑚组成的海底脊状结构，即礁、暗礁或珊瑚礁；二是指帆的一部分，在大风时可以折叠或卷起以减小面积。

A noun with two primary meanings: a submerged ridge of rock, sand, or coral near the water's surface; or a part of a sail that can be folded or rolled up to reduce its area in strong winds.

1. B1formal

   A submerged ridge of rock, coral, or sand near the surface of the water.

   礁

   • The shipwreck was discovered near a coral reef.
   • Divers explored the vibrant reef teeming with marine life.
   • The reef is a popular spot for snorkeling.

   同义词barledgesandbarshoal

2. Sail stripC1formal

   One of several strips across a sail that can be taken in or rolled up to reduce the area exposed to the wind.

   缩帆带

   • The sailor took in a reef to reduce the sail area during the storm.
   • He tied the reef points to secure the sail.
   • Adjusting the reef helps control the boat's speed.

• 指通过收卷或折叠帆的一部分来缩小帆面积的动词，通常是为了适应强风条件。

A verb used to indicate the act of reducing the area of a sail by rolling or folding a portion of it, typically to adapt to strong wind conditions.

1. Reduce sail areaC1formal

   To reduce the area of a sail by rolling or folding a portion of it, typically to manage wind conditions.

   缩帆

   • The sailors reefed the mainsail as the wind picked up.
   • He taught me how to reef a sail properly.
   • They had to reef the jib to prevent the boat from heeling too much.

   同义词furlshortentake in

   反义词spreadunfurl