Usually there is only one or two a year bright enough to be seen with the naked eye.

通常，一年只有一到两颗彗星明亮得肉眼可见。

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Eye contact is one way of measuring the degree of closeness of relationship between two speakers, although there are cultural variations in the meaning of eye contact.

目光的接触是衡量两个谈话人之间关系亲密程度的一个标准，尽管在不同的民族文化中对目光接触的意义有所不同。

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But why did we think all pirate crews had an old sea cook with a wooden leg, a captain with a parrot and at least one hook and two eye-patches elsewhere in the crew?

但是为什么我们认为所有的海盗团伙都得有一个带木腿的年老厨师，一个带鹦鹉的船长，并且在整个团伙中至少得出现一个铁钩和两个眼罩？

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The latest 3-D TVs work by dividing picture images in two,one for each eye.

VOA: special.2010.01.26

One eye or two, or seven?

FORBES: Magazine Article

This travels into the brain along an optic nerve (there is one for each eye) to arrive at one of two small clusters of nerve cells called the lateral geniculate bodies.

ECONOMIST: The biology of art | The

The prosecutor, Omid Talai, brought forth three eye witnesses, two walkers and one driver, who testified about seeing the accident happen.

FORBES: Google Glass Will Be Incredible For The Courtroom