perrylkt 发表于 2014-9-1 16:36
首先平行的那一部分是一些状态:sickness sleeping on the job, fatigue among shift workers。加上raise ...
yuyuxiao123 发表于 2014-9-13 09:12
而且,如果按照楼主这样理解的话,‘reduced sickness, sleeping on the job’中间也要加上and连接吧,嘿嘿 ...
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