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生活充满着上下起伏，特别当你是一个电梯操作工时。
Life is full of ups and downs, especially when you're an elevator operator.
youdao
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操作工数量：列出标准工时所需操作工数量。
Oper: list the number of operators that the standard hours listed represents.
youdao
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操作工数量：列出标准工时所需操作工数量。
Oper: list the number of operators that the standard hours listed represents.
youdao