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

If I move my head a fraction to the left the drive elongates and the tops of the limes veer suddenly to the side, distorted by the imperfections of handmade glass.

NPR: Excerpt: 'The Sister'

It also points out that its consumption and emission levels per head remain a mere fraction of America's.

ECONOMIST: America and China talk climate change

Some bankers in Moscow and Paris said they were perplexed by the case, as the sum of five million rubles is a fraction of the 100 million rubles per year that the head of a large Russian bank would expect to earn.

WSJ: Russian Police Detain Head of SocGen Unit