sweat over something
phrasal verb with sweat verb uk/swet/ us/swet/
埋头做（某事）
to work very hard using or doing something
She's been sweating over that essay all afternoon. 她整个下午都在埋头写那篇论文。
I've been sweating over a hot stove (= cooking) all morning. 我整个早上都忙着做饭。