阿丹：我们也可以说英语，但是可以中英文替换着轮流说。
Dan: We can speak English, too, but let's switch off and take turns.
鞋子应避免接触溶剂，酸，碱，油等。维持两双以上可替换的鞋，让鞋子轮流休息。
4 shoes should avoid contact with solvent, acid, alkali, oil and so on. Maintain more than two pairs of shoes can be replaced, so that the shoes turns to rest.
员工的轮流替换；
员工的轮流替换；
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