短语 “set your sights high” 的字面意思是 “把眼光放高”，但它实际被用来描述人们给自己定下很高的目标、志向或要求。

例句
I like to set my sights high – I want to get a promotion in the next three months.
我想把目标定得高些。我想在未来的三个月内得到晋升。

We're aiming to double our profits this year. We're really setting our sights high.
我们的目标是将本年度的利润翻番。我们真的是定下了很高的目标。

If you set your sights high you will achieve a lot more.
若立志高远，则成果卓著。