?撞倒

... hand down (从上代)传下来 knock down 撞倒，拆除，降低(价格等)，击倒 pass down 留传，把……传下来 ...

?击倒

... ③She lied to her mother. 她对母亲说了谎。 knock down: 击倒；打倒；撞倒 knock in (into): 敲进；打入 ...

?拆除

... keep up(with)跟上；赶上；保持；不落在后面；及时了解(情况) knock down拆除；拆卸；打倒，撞倒；使减价 knock off下班，停止工作；减低，扣掉；匆忙做完(写完) ...

?击落

... kind of(状语)有点儿，有几分 knock down撞倒;击落;拆除 knock off把…敲掉;击倒;停工 ...