depletion

名词 depletion:

1. the act of decreasing something markedly
2. the state of being depleted

de.ple.tion

n.（名词）
The act or process of depleting.
损耗，减损：损耗的行为或过程
The state of being depleted; exhaustion.
耗尽：被损耗的状态；精疲力竭，耗尽
The gradual use or consumption of a resource, especially a natural resource.
（逐渐）消耗：对资源（尤其是自然资源）的逐渐使用或消耗