水底的英文：
submarine
sunken

The flounder lives on the sea bottom with the eyed side on top.
比目鱼卧于水底，有眼侧朝上。

netted sunbeam
映在水底上的网形日光

He dived into/beneath/under the water.
他潜入水中;水底。

ledger tackle
能使钓饵沉于水底的鱼具

Depth charge: or depth bomb; Weapon used by ships or aircraft to attack submerged submarines.
深水炸弹:由水面上船只或飞机攻击水底潜艇之武器。

To search or sweep the bottom of(a body of water,as with a grappling hook or dragnet.
搜寻用抓钩或拖网在水底进行搜寻或打捞

For nearly three and a half centuries she lay at the bottom of Stockholm harbor until her discovery in 1956.
这艘帆船埋于斯德哥尔摩港口水底近三个半世纪,直到1956年才被发现。

Measure light intensity on the water surface and at the bottom by a light probe connected to light meter.
用连接在光照度计上的光探头测量水面及水底的光照度。

However often you mix it up in the water, the mud will gravitate towards the bottom again.
不论你怎样搅水里的泥土，它还会再沉到水底的。

However often you mix it up in the water,the mud will gravitate towards the bottom again.
不论你怎样搅水里的泥土，它还会再沉到水底的。

Can you get a fix on the submarine?
你能给潜水艇定位吗?

The submarine signaled for help.
潜水艇发出求救的信号。

submarine torpedo craft
潜航水雷艇

The submarine will soon rise to the surface of water.
潜水艇很快会浮到水面上。

Submarine cables were laid across the Atlantic.
铺设了横越大西洋的海底电缆。

They dragged for a sunken boat.
他们曾用网打捞沉船。

So sunken and suppressed it was that it was like a voice underground
它是这样的低沉而咽塞，好象是地下的声音。

These are the sunken rocks on which great ships are often wrecked.
这些是常常使大船失事的暗礁。

A decorative sunken panel in a ceiling,dome,soffit,or vault.
饰板在天花板、圆屋顶、拱腹、拱顶内的下凹装饰镶板

A shipping company has made a claim for the cost of salvaging a sunken ship
某轮船公司要求赔赏打捞沉船的费用。(make a claim要