A survey in America by Spherion Staffing discovered that 53% of workers had been compelled to take on extra tasks since the recession started.
Spherion Staffing在美国做的一项调查发现，自从经济衰退开始以来，53%的员工被迫担负了额外的工作。
It was because a lot of workers had been laid off.
这是因为很多工人被解雇。
The report revealed that workers had been exposed to high levels of radiation.
报告揭示工人们曾暴露在高辐射之下。
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。
Some 200 police officers and volunteer rescue workers had been searching for the boy.
为了找到这名男童，大约200名警员和志愿搜救人员加入了搜寻行动。
Some 200 police officers and volunteer rescue workers had been searching for the boy.
为了找到这名男童，大约200名警员和志愿搜救人员加入了搜寻行动。
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