Over-qualified workers are likely to quit the minuter they find a better job.
学历高的人一旦找到更好的工作可能就会辞掉原来的工作。
if there is any effect of noise upon mental health it must be so small that present methods of psychiatric diagnosis cannot find it.
如果噪音对精神健康有影响的话,那也一定是微乎其微,以致现代的精神病诊断方法还发现不了。