wash sth down (with sth)
(a) clean sth by using a stream or jet of water 用水喷射冲洗某物
wash down the decks 冲洗甲板
wash down a car with a hose 用水龙冲洗汽车.
(b) drink sth after, or at the same time as, eating (food) 用饮料将吃的(食物)送下
I had bread and cheese for lunch, washed down with beer. 我午餐吃的是面包和奶酪, 喝的是啤酒.