1、碰撞
Knock Against(碰撞), 此释义来源于网络辞典。
2、与…冲突
... knock back （摇把）反击，（活塞）逆行，（曲轴）反转；反座；回击，击退；使...大吃一惊 knock against 撞击，与…冲突；偶然遇见 knock sensor 爆振传感器；进气流量传感器 ...
knock k against撞到…上
knock up against碰撞;偶然碰见;同;同…冲突
knock head against有效地抵抗
knock against each other互撞
knock k up against碰撞;同…冲突
knock against sth撞到…上
knock against sb不期而遇