暗礁

submerged reef

ledge

rock

reef

shelf

redge

hidden rock

drowned reef

bank

sunken reef

key

暗礁[ànjiāo]

-reef;submergedreef[rock];sunkenreef[rock];ledge;shelf:
Theshipwaswreckedonthehiddenreef.那艘船撞到暗礁沉没了。

至暗礁的垂直距离有五百英尺。
There was a sheer drop of five hundred feet to the rocks below.

那船触到了一些暗礁沉没了。
The ship hit some rocks and sank.

因为河上有暗礁，所以在这条河上航行很困难。
Navigation is difficult on this river because of the hidden rocks.

船只因撞在暗礁上而留下了疤痕。
The boat has scars from hitting the reefs.