adj.击倒的；易拆卸的；降低的
n.打击；减价；可拆卸的东西
He flashed me a knockdown charming smile. 他冲着我可爱地笑了一下。
A knockdown blow made the man fall down at once. 强有力的一击使得那男人很快倒下了。
It was the last one they had and they sold it me at a knockdown price. 这是他们手中的最后一个，他们以低价卖给了我。
India is planning to produce a laptop for the knockdown price of roughly $20. 目前，印度正计划生产一款售价极低的笔记本电脑，每台售价约为20美元。
