东西互相撞击to knock

• 瓷器没有包装好，在路上全磕碰碎了。

  The china wasn't wrapped up properly, and it got knocked and broken on the journey.

人和东西相撞<方>to bump into

比喻冲突to clash

• 生活上出现一点磕碰是难免的。

  A little conflict is unavoidable in life.