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“汗流浃背”，汉语成语，意思是汗水流得满背都是，多形容因恐惧或体力消耗流了很多汗，衣服都湿透了。可以翻译为“be streaming with sweat（from fear or physical exertion），或be soaked with sweat”。
例句：
在阳光的强烈照射下他们已经汗流浃背。Already they were sweating as the sun beat down upon them.
他大惊失色，汗流浃背。He turned pale with fright and sweat broke out all over his body.