youdao

I remember a servant who used to tell me that if I were not good, by which she meant if I did not behave with a single eye to her personal convenience, the cock would come down the chimney.

我记得有一位佣人曾经告诉我说，如果我不做好孩子，那公鸡就会顺着烟囱爬下来，她说这话的意思其实就是如果我做什么事情，只要稍微没考虑到她个人方便与否的话，那么就不会有好事降临在我的头上。

youdao

In 2008, scientists from the University of Copenhagen, found that all people with blue eyes were descended from a single ancestor with a blue eye mutation who lived six to 10, 000 years ago.

2008年，哥本哈根大学的科学家们发现所有蓝眼睛的人都有一个共同的祖先，这位祖先生活在10,000年以前，眼睛出现蓝色变异。

youdao

Finally,a single ray of light shot from out and fell full upon the vulture eye.

VOA: special.2009.05.16

And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.

VOA: special.2009.05.16

The creatures had underdeveloped brains and a single eye planted, cyclopslike, in the middle of their foreheads.

FORBES: The Curious Case of The One-Eyed Sheep

For a moment a single eye gleamed at me from within the darkness.

NPR: 'Ancestor Stones:' Life and War in Sierra Leone

Mutations of Sonic hedgehog in people may result in babies with a single eye or a hole in the center of their head.

FORBES: Magazine Article