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运算符号
1、discontinued operation───[经] 停（中）止经营；停止经营
2、operation───n.Cao作；经营；[外科]手术；[数][计]运算
3、commercial operation───[经] 商业经营
4、operation management───运营管理；经营管理；Cao作管理
5、heart operation───心脏手术
6、operation manual───Cao作指南；Cao作手册；[计] Cao作指南，Cao作手册; [化] Cao作手册
7、sign of───······的符号；······的标志
8、hours of operation───运营时间；工作时间；营业时间；Cao作时间
9、strabismus operation───[医]斜视手术
1、An operator, such as the + sign, is a character (or sometimes a short sequence of characters) that indicates a computational operation. In an expression, a term must be one of the following.───Cao作符，例如+，是一个字符(或者有时候是一小串字符)指明了运算种类。
2、The review in the sign of operation and curative effect of 235 cases discectomy───235例髓核摘除术手术指征与疗效回顾
3、They will sign agreements on scientific co-operation and the cross-recognition of patents. They will also talk of weightier matters.───他们将会签订科学技术合作合约和专利权互相认可条例，他们也将会谈一些更为重要的事项。
4、Western donors had hoped that international cyclone relief would crack open the door to broader co-operation on aid, and perhaps a dash of glasnost. There is little sign that it did.───西方的捐赠者希望，国际上对热带风暴的救灾物资能使得救援方面的合作更为广阔，或许能使社会问题得以公开讨论，但事与愿违。