An operation is an abstract definition of an action supported by the service.
操作是被服务支持的行为的抽象定义。
Abstract: Business English advertising is the specialist language for international Business English activity service.
摘要：商务英语广告是为国际商务英语活动服务的专门用途语言。
Abstract: Business English advertising is the specialist language for international Business English activity service.
摘要：商务英语广告是为国际商务英语活动服务的专门用途语言。
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