| 例句 |
A pair of tights has the lifespan of a mayfly.紧身裤袜的使用期极短。Some plastics are designed to biodegrade when their useful life is over.有些塑料被设计为过了有效使用期就可以生物降解。The day for changing from one occupancy to the next was on a Saturday.使用期的变更日在星期六。North Sea operators kicked against legislation making them responsible for removing oil platforms at the end of their useful life.北海的石油开采商激烈反对要求他们在石油钻井平台使用期结束之后将其移除的立法。 |