knock down

柯林斯词典

1. PHRASAL VERB To knock down a building or part of a building means to demolish it. 拆掉 (建筑物等)
Why doesn't he just knock the wall down?
他为什么不索性把墙拆掉？
2. PHRASAL VERB If someone is knocked down or is knocked over by a vehicle or its driver, they are hit by a car and fall to the ground, and are often injured or killed. (开车) 撞倒[英国英语]
He died after being knocked down by a car. 他被一辆汽车撞倒后死了。
A drunk driver knocked down and killed two girls. 一个喝醉了酒的司机撞死了两个女孩子。
A car knocked him over. 一辆汽车把他撞倒了。
3. PHRASAL VERB To knock down a price or amount means to decrease it. 降低 (价格)[美国英语]
The market might abandon the stock, and knock down its price. 商场可能会清理库存，降低价格。