depletion

n. /dɪˈpliː.ʃən/ C1

消耗；枯竭

A reduction in the amount or number of something.

仙境例句

The depletion of hedgehogs worried the King, for half of them had walked away.

刺猬越来越少，让国王很担心，因为有一半都自己走掉了。