挥汗如雨的英文：
[Literal Meaning]
swipe/sweat/like/rain
to swipe off sweat as if it was raining

[解释]
形容天热出汗多或者工作很努力。

[Explanation]
to sweat a lot for the heat of the weather or hard work

[例子]
在北京奥运会的工地上，工人们在烈日下挥汗如雨，忙碌地工作着。

[Example]
In the construction fields of Beijing Olympics, the workers were sweating a lot for hard work under the hot sun and working industriously.

[英文等价词]
perspiration came down like raindrops

"In the sweltering 37 degree heat, the riders had one thing on its mind--survival."
在令人挥汗如雨的37度高温下,车手们只有一个念头--坚持下去。