The Mirror Image and Session Facade patterns are useful for changing actors in use case diagrams into valid abstractions in class diagrams, which ultimately results in a cleaner translation to code.
对于将用例图中的参与者转换成类图中有效的抽象，镜像映象模式和会话虚包模式是很有用的，这样最终将能够更清楚地转换成代码。
Sign up for that pole-dancing or burlesque workshop, or try a general cardio dance class that lets you gaze at your reflection in the mirror while you work out.
参加体操舞或者滑稽戏表演，或者试试普通的有氧舞蹈班，如果你这么做，你会对自己镜中的身影感到惊讶。
Everytime after class, he looked in the mirror carefully.
每节课下课他都要用小镜子仔细照一番。
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