run up against

• • 与…相撞：

    Mike's car ran up against a tree yesterday.

    迈克的车昨天撞到一棵树上。

  • 偶遇，碰见：

    If he runs up against his girlfriend,there'll be trouble.

    如果他碰见了他的女朋友，那就麻烦了。

  • 遭遇(困难、麻烦等)：

    If you try to change the name of the school you will run up against a lot of opposition.

    倘若你要更换学校的名称，你会遭到多人的反对。