这个英语句子什么意思,为什么要加by.

题目

这个英语句子什么意思,为什么要加by.
The research discovered that shop-floor humour became a means by which workers sought to control those perceived to be not ' pulling their weitht'.
是的 不好意思 应该是pulling their weight我打错字了

答案

直译：研究发现,车间幽默已经成为一种手段,被工人用来尝试管理那些无法恪尽职守的人.shop-floor 车间by means （of) 凭借.手段,以.方式 by which 中的which指代means,指车间幽默这种方法、手段seek to 寻求,试图perc...