1.the depths<文>(deep sea)深海
The submarine sank slowly into the depths.潜艇缓慢地下沉至深海。
2.the depths of sth
(most extreme part)+of winter…最深处；+of despair, recession…最严重的时候；…最强烈的时候
I was in the depths of despair.我当时陷入了绝望的深渊。
The country is in the depths of a recession.这个国家处于衰退最严重的时期。
3.the depths of sth
(remote parts)+of wood, countryside…最深处；…腹地
4.(low moral standard)道德低下
He said it was absolutely disgraceful that anyone should sink to such depths.他说任何人堕落到如此地步都是极为可耻的。
5.<文>(abyss)深处；深渊
the depths of hell地狱深渊
the depths of space太空深处