周期: period; cycle; circle; revolution; round; complete alternation 短语和例子产业周期 industrial cycle; 经济周期 economic cycle; 商业周期 business cycle; trade cycle; 生产周期 production cycle; 再生产周期 cycle of repr
分类: 1.(使分别归类) classify; itemize; sort 短语和例子根据起因将事故分类 classify accidents by cause; 根据性别[年龄; 民族; 地区] 分类 classify by sex [age; nationality; locality]; 邮局里的人员将信件按寄送地点分类。 men in the post office cla
