draw something off
phrasal verb with draw verb uk/drɔː/ us/drɑː/ drew | drawn
（尤指通过管道）抽出，放出，排出
to remove a small amount of liquid from a larger amount, especially by allowing it to flow through a pipe
She drew off a little of her home-made wine just to taste. 她取出一点儿自家酿的酒尝了尝。