• 叩头
• 撞头

knockupn.[竞赛]暖身练习knockv.敲击；互撞；攻击n.敲；敲门；敲打Knocking On Heavens Door气门knock them on the aislesvi.演得很成功knock a person senseless把人击昏knock off one's pedestal防火门knock sth. on the head破坏某事knock them in the aisles大受观众欢迎knock someone's head off上门送货knock down customization套件定制knock one's head against门窗幕墙knock over like skittlesvi.一下打倒