ph.

1. I ran up against Bill in the market.
    我在市场里碰见比尔。

1. 意外地碰到(困难等)：run through 跑着穿过;刺 | run up against 意外地碰到(困难等) | run upon 撞击;触(礁)

2. 遇到：run sb out of the town 把某人逐出市外 | run up against 遇到 | run wild 到处跑

3. 遭遇,遇到：91. knock oneself out 辛苦地工作,工作努力 | 92. run up against 遭遇,遇到 | 93. far from 远非如此

4. 偶遇：run true to form 一如既往 | run up against 偶遇 | run up to 跑到

1. 突然遇到(问题);突然碰到(困难)
    If you run up against problems, you suddenly begin to experience them.

    e.g. I ran up against the problem of getting taken seriously long before I became a writer...
           我突然遇到了这样的问题：虽然还没有成为作家，却过早受到了重视。
    e.g. He ran up against a solid wall of opposition when it came to the sensitive issue of party privileges.
           当涉及党派特权这样敏感的问题时，他遭到了坚决的反对。