knockdown barge[船] 可拆卸驳船
Cricket Knockdown板球击倒
Surprise Knockdown突击击倒
Knockdown Factors折减因子
knockdown rate击倒率
knockdown tower拆卸式战标
knockdown rates击倒率
fire knockdown控火
knockdown timekeeper击倒计时员;击打计时员
ADJ（形容词） A knockdown price is much lower than it would be normally. 低廉的 [非正式][ADJ n]
...the chance to buy it now at a knockdown price.
...现在以低价购买它的机会。