depletion

詳細解釋：

de.ple.tion

n.（名詞）
The act or process of depleting.
損耗，減損：損耗的行為或過程
The state of being depleted; exhaustion.
耗盡：被損耗的狀態；精疲力竭，耗盡
The gradual use or consumption of a resource, especially a natural resource.
（逐漸）消耗：對資源（尤其是自然資源）的逐漸使用或消耗