the deep end

the end of a swimming pool where the water is deepest

深水区

go off (或 go in off) the deep end

(informal)give way immediately to an emotional outburst, especially of anger

(非正式)发作（尤指因愤怒）

in deep water (或 waters)

(informal)in trouble or difficulty

(非正式)遇上麻烦，处于困境

he landed in deep water when he began the affair.

他开始婚外恋的时候就惹上麻烦了。

jump (或 be thrown) in at the deep end

(informal)face a difficult problem or undertaking with little experience of it

(非正式)碰上难题，撞上麻烦

deep down

At bottom; basically

在内心深处；根本上

Deep down, she was still a rebel.

她实质上仍是个叛逆者

in deep water

In difficulty.

陷入麻烦