The smell from the garbage dump was so stomach-churning I could barely stand it.

stomach-churning 是由 stomach（胃）和 churning（搅动）组成的复合形容词。stomach 指"胃部"，churning 是动词 churn（剧烈搅动）的现在分词形式。 stomach-churning 字面意思是"让胃部翻腾的"，引申为"令人作呕的、令人恶心的"，用来形容极其难闻的气味或令人不适的场景。