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It was because a lot of workers had been laid off.
这是因为很多工人被解雇。
youdao
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So the researchers asked whether any lab workers had been sick during that period.
所以，研究人员询问全体实验室工作人员在此期间有否生过病。
youdao
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So the researchers asked whether any lab workers had been sick during that period.
所以，研究人员询问全体实验室工作人员在此期间有否生过病。
youdao