一日一成语【32】with half an eye

with half an eye

粗看起来，这个成语可真奇怪。人看东西至少也得要用一只眼睛吧!用半只眼睛看是什么意思呢？细想一下，你就不会感到困惑了。我们在形容一个人仔细地看一样东西时，常说：“睁大眼睛看个清楚”；反之，如果一个人的眼睛只是半开半闭，那他当然不可能看得很仔细，只可能看个大概，或者只是很快地瞟一眼，这就是with half an eye的含意，它常用以表示“粗看一下便知道”这种意思，说明某一事情，某一现象是显而易见的：

The new teacher could see with half an eye that the girls in the class are more mischievous than the boys.
新来的老师一看便知道，这班上的女生比男生更调皮。

Anyone can see with half an eye that the essay was written with the help of an adult.
谁都看得出，这篇文章是在大人的帮助下写成的。

You can see with half an eye that he is not getting along very well with his neighbour.
你不难看出，他和邻居处得不好。