minimum
最低限度，最小数（量）

例句：
We must try our best to reduce the damage to a minumum.
我们必须尽力把损失减小到最低限度。

Rob Peter to pay Paul
借东还西；拆东墙补西墙
   
例句：
Trying to study a lesson for one class during another class is like robbing Peter to pay Paul.
在一节课中读另一节课的功课等于是拆东墙补西墙。

Have I made myself clear?
我说清楚了吗？ 

对话：
A: I don't want you to see my daughter any more. Have I made myself clear?
B: Yes. But we really love each other deeply.
　
A：我不希望你再见我的女儿，你明白了吗？
B：是的，但是我们确实是彼此深爱对方的呀。