软件即服务以服务形式按需提供完整的应用程序。
Software as a service has a complete application to offer as a service on demand.
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即，期望客户端发送一个更新产品的完整表达式。
That is, the client is expected to send a complete representation of the updated product.
他们即非完整，也非通用。
They're neither complete nor universal.
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