扬汤止沸[yáng tāng zhǐ fèi]
词典try to stop water from boiling by scooping it up and pouring it back -- an ineffectual remedy
词典stir the soup to stop boiling -- a temporary redress：扬汤止沸。
词典stop vainly the ebullition of a pot：扬汤止沸。
扬汤止沸[yáng tāng zhǐ fèi]
try to stop water from boiling by scooping it up and pouring it back -- an ineffectual remedy; stir the soup to stop boiling -- a temporary redress; stop vainly the ebullition of a pot