by the后面加什么

By the time you get there the meeting will be over.

等你到了那里的`时候，会议就该结束了。

Day care is provided by the company she works for.

她工作的那家公司有日托。

A new era was brought into being by the war.

那场战争使得一个新的时代产生了。

All the statistical computations were performed by the new software system.

所有的统计计算均由新的软件系统完成。

By the age of 21 he controlled the company.

他21岁就掌管了公司。