decompose [ˌdi:kəmˈpəʊz]

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vi.分解；vt.（使）腐败，（使）腐烂

to decay , or to cause something to decay

The eggs began to decompose after a day in the sun. 鸡蛋在太阳下放了一天后开始变坏。
Most animals decompose very quickly after death. 大多数动物死后很快腐烂。