1.
(existing or placed)under the surface of the sea
（存在或置于）海面下的
2.
the sky above and the sea below
上面的天, 下面的海
3.
the lee side [shore]
下风面 [下风的海岸]
4.
The crust under ocean deeps would be thinner than under land surfaces at or near sea level.
深海下面的地壳比海平面或者接近海平面的陆地下面要
5.
relating to the deepest parts of the ocean (below 6000 meters).
关于海洋中最深区域的（海面以下6000米）。
6.
The water from the Red Sea will be used to prevent the sea level of the Dead Sea from lowering.
从红海引来的水将用于阻止死海海平面下降。
7.
It is also very low-lying, at around 395 metres below sea level.
死海的地势也很低，约在海平面以下395米。
8.
The Study of Whitecap Effect to Modes of Microwave Remote Sensing under High Oceanic Situation;
高海况下海面白冠对微波遥感模式影响的研究
9.
Well, I'd like to tell you something about it first.
下面，我先介绍湛江东海岛的一些情况。
10.
Riptide is a strong underwater current.
激潮是海面下一种强大的暗流，
11.
Fully one-fourth of Holland is below sealevel.
荷兰的整整四分之一在海平面下。
12.
Below us the Mediterranean tossed its breakers against the rocks.
在我们下面，地中海的激浪冲击着岩石。
13.
From the hilltop we saw the blue ocean below .
从山顶上我们看见了下面的蓝色海洋。
14.
From the hill top we saw the blue ocean below.
从山顶上我们看见了下面蓝色的海洋。
15.
Riptide is a strong underwater current. It moves quickly away from shore and out to sea.
激潮是海面下一种强大的暗流，从海岸迅速地流向大海。
16.
The sea gradually smoothed down.
海面逐渐平静下来。
17.
get the steam roller out
希望海面能平静下来
18.
The sun dips below the sea.
太阳沉入海平面以下。