a large container for storing liquid or gas

〔储存液体或气体的〕箱，罐:

The water tank is leaking.

水箱在漏水。

Somehow the chemical got from a storage tank into water supplies.

不知怎么的，这种化学物从蓄水箱进入了供水系统。

the plane's fuel tank

飞机的油箱

also tankful the amount of liquid or gas held in a tank

〔液体或气体〕满满一箱的容量:

We set off next day on a full tank.

第二天我们油箱满满地出发了。

a tankful of petrol

一箱汽油

a heavy military vehicle that has a large gun and runs on two metal belts fitted over its wheels

坦克

a large artificial pool for storing water

人工蓄水池

in the tank, [AmE informal] failing and losing money

失败; 赔钱:

Sales can't keep going up, but that doesn't mean the industry is going in the tank.

销售不能持续增长，但那并不是说这个行业不景气。

[I] to decrease quickly or be very unsuccessful

快速减少; 完败:

Not long after the chairman resigned, shares in the company tanked.

董事长辞职后不久，该公司的股票就暴跌了。

[I] [BrE informal] to travel very fast in a car or vehicle

乘车快速行进

[I] [informal] to fail badly and be very unsuccessful

彻底失败:

His last film tanked in the States, but did well in the UK.

他最新的电影在美国一败涂地，但在英国却很成功。

also tank it [T] to deliberately lose a sports game that you could have won

故意输掉比赛，佯败