Or make yourself sweat by trying to workout a tricky math problem in your head like dividing 243 by 7.

或是在大脑中计算一道棘手的算数题，比如243除以7是多少，以此达到让自己流汗的效果。

They were sweating and filthy with dust and oil by the time they had him lying in the road.

当他们让他躺在路上时，他们已经满头大汗，身上满是灰尘和油污。