depth在中文意思是n. 深处深渊的时候加s，变成复数。

Marine life was discovered at depths previously thought to be azoic.在先前被认为没有任何生命迹象的海洋深处发现了海洋生物。

Now she was dredging up memories from the depths of her mind.

这时，她回忆起内心深处的往事。