saw with half an eye

• v. 一目了然(一望而知)

saw with half an eye的用法和样例：

例句

用作动词 (v.)

1. That can be seen with half an eye.
   约略一看便一目了然。
2. He would have an idea of what was happening to Hearn.
   他对候恩的情况可以一目了然。