She hesitated for a fraction of a second before responding.

她犹豫了一下才回应。

《柯林斯英汉双解大词典》

The message arrives in your brain in a fraction of a second.

信息瞬间便可传递到大脑。

《牛津词典》

"We saw this fish pounce a couple of times," says photographer Tim Laman. "His mouth shot out and back in a fraction of a second."

“我们见过这只鱼的数次突袭。”摄影师蒂姆·雷曼说。“它的嘴一开一合仅需一瞬间。”

youdao

I think its a major blow to the nations medical fraternity. It takes six years to produce a doctor, and within a fraction of a second, all that has disappeared. A week ago,Dr.Laroche was in Somalia and met with the minister of health.

VOA: standard.2009.12.05

When a brief pulse of electricity is sent to the read/write head it flips on a tiny electromagnet for a fraction of a second.

当一个简单的电脉冲被送到读写头,它会短时间内出现一个小的电磁。

哈佛公开课 - 计算机科学课程节选

Those of you who know other languages might have in your heads 200,000 words or 300,000 words and you're accessing them in a fraction of a second.

你们当中掌握其他语言的人,可能会在头脑中记住两万到三万个词,你们能在瞬间运用它们

耶鲁公开课 - 心理学导论课程节选

If I want to filter or collapse records and hit match, it is done in a fraction of a second.

FORBES: Microsoft Windows 8 - A Boon To Back Office Processing?

The robot now can make cuts that are accurate to within millimeters and do them within a fraction of a second.

WSJ: Robots Can Perform Surgery, But Can They Debone a Chicken?

C. airport and installed iris scanners that can, from 1 foot away and in a fraction of a second, confirm a pilot's identity.

FORBES: Spotting Evil