PHRASAL VERB-ERG (液体或食物)煮稠;把…熬稠 When you boil down a liquid or food, or when it boils down, it is boiled until there is less of it because some of the water in it has changed into steam or vapour. (液体或食物)煮稠;把…熬稠
He boils down red wine and uses what's left. [VERBPREP. noun]
他把红酒熬稠后再用。
This may seem a large quantity of mushrooms, but they do boil down considerably. [VERBPREP.]