The guards were ordered to shoot on sight anyone trying to escape.

卫兵接到命令，看见有谁企图逃跑就立即开枪。

《牛津词典》

They detested each other on sight.

他们互相看着就不顺眼。

《牛津词典》

Troops shot anyone suspicious on sight.

军队一见可疑的人就开枪。

《柯林斯英汉双解大词典》

I believe I would have been legally and morally justified in shooting any of them on sight, but I did not do so or attempt to do so;

VOA: special.2010.02.15

On the other hand, if out of sight out of mind, they should expect the screen to keep going.

另一方面,如果看不见就觉得不存在,那么婴儿会期待屏板继续移动

耶鲁公开课 - 心理学导论课程节选

God's extremely peculiar configuration of the human body You read this and you realize that Samson is really on to something here Why didn't, we ask with Samson God implant the sense of sight in human beings just as he implanted the sense of touch or feeling?

还有上帝对人体极其古怪的构造,读这些你们就能意识到参孙在这确实知道一些意图,我们和参孙一样也想问,为什么上帝不让人类拥有视觉,就像让人类当初拥有触觉一样？

耶鲁公开课 - 弥尔顿课程节选

Elsewhere, they are so populous they can be legally shot on sight in many cases.

WSJ: In Utah, a Town Digs Deep to Battle Prairie Dogs

United were shooting on sight of goal and a Robertson snap-shot went just wide.

BBC: Andy Webster holds off Hearts' Jamie Mole

It made Beatles records instantly recognizable on sight--as equally recognizable as the Apple Computer logo is today.

FORBES: Two Apples Heading Back To Court