名词
中文翻译：Unknown
同义词：
['changing', 'switching', 'swapping']
例句：
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1.The switch on the light is broken.
灯的开关坏了。
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2. He switched to a different car after his old one broke down.
他的旧车坏了之后，他换了一辆新车。
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3.They switched their focus from research to development.
他们从研究转向了开发。