1. beyond the reach of 鞭长莫及;无法达到
Such matters are beyond the reach of the law.
这样的事情不受法律的管辖
。2. bump against 撞上
The stool is placed in front of the door, so people often bump against it when walking by.
凳子放在门口,走路的时候总是磕碰
。3. touch on 与…有关,涉及
In his speech he was only able to touch on a few aspects of the problem.
他在演讲中只能涉及这个问题的几个方面
。