The design of the remainder of the subject rests on a case-study approach using three specific examples drawn from the prehistoric period and the pre-industrial era.

学程的其余设计仰赖史前时期和工业化前的时代的三个具体例子放在案例研究上。

youdao

In the peak period from 1906 to 1910, the warming effect of the industrial soot throughout the Arctic was estimated at eight times that during the pre-industrial period.

BBC: Human activities have left a visible mark on the Arctic