1. 碰撞;相撞
    A collision occurs when a moving object crashes into something.

    e.g. They were on their way to the Shropshire Union Canal when their van was involved in a collision with a car...
           在去往什罗普郡联盟运河的路上，他们的小货车与一辆小车相撞。
    e.g. I saw a head-on collision between two aeroplanes.
           我看见两架飞机迎面相撞。

2. (不同文化或思想的)碰撞，冲突，抵触
    A collision of cultures or ideas occurs when two very different cultures or people meet and conflict.

    e.g. It's the collision of disparate ideas that alters one's perspective...
           是迥然不同的观点之间的碰撞改变了人们的看法。
    e.g. The play represents the collision of three generations.
           这部戏表现了三代人之间的矛盾冲突。