他们出汗了用英语可以说成 "They are sweating."

来源:出汗是人体正常的生理现象,当体内的温度升高时,皮肤就会分泌汗液来降低体温。

一些英文例句和中文翻译如下:

"She was sweating profusely after running a marathon." (她跑完马拉松后出汗很厉害。)
"He was sweating bullets during the job interview." (在工作面试中,他出汗很多。)
"It's so hot in here, I'm sweating just sitting still." (这里太热了,我坐着都在出汗。)