noun · the foundational liquid or pan drippings used to create a gravy or sauce

他利用锅底残留的底汁调制出了一款美味的酱汁。

noun · a liquid prepared by simmering meat, bones, or vegetables, used as a foundation for soups and other dishes

厨师正在熬制底汁，为今晚的浓汤做准备。