一眼

wǒ yī yǎn jiù kàn chū shì tā

我一眼就看出是他。

I saw it was him in a glance.

guǎng dà qún zhòng yī yǎn jiù shí pò le tā men de yīn móu

广大群众一眼就识破了他们的阴谋。

The masses can see through their schemes with a glance.

piē yī yǎn

瞥一眼

cast a side look

dǎ yī yǎn jǐng

打一眼井

hit a well