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If he were free, he would help us.()

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根据构件的类型、曲率、施工方法和要求,加工样板可使用铁样、三角样板和样箱。()

They had been washed before I got home.()

I'm glad to make an acquaintance,Mr Smith.()

工资刚性就是指工资具有弹性。()