暗礁

Navigation is difficult on this river because of hidden rocks.

由于多暗, 在这条河上航行很困难。

The ship ran into a shelf and sank to the bottom of the sea.

船撞上了暗, 沉入了海底。

The ship was bilged by a submerged reef.

船撞上暗, 结果船 底漏了。

The ship was wrecked on a coral reef.

这条船在珊瑚暗上撞毁了。

Fish are abundant about the reefs.

暗鱼很多。

A mariner must have his eye upon rocks and sands as well as upon the North Star.

海员仅要盯着北,要注意暗和险滩。

Beware! Dangerous submerged rocks ahead.

当心！前面暗危险。

The olive sea snake is a peaceful animal that travels along the reefy sea bottoms of the tropics in search of small prey.

行和海洋。这橄榄色的海蛇是一种和平的安宁的动物，它巡游多数沿着热带的海洋暗的底部寻找小的牺牲者。