Another interesting fact about hair is that it is very strong—as strong as iron in fact.

另一个关于头发的有趣的事实是，它非常结实——事实上和铁一样结实。

youdao

This lecture covers a number of facts about hair—its structure and what can affect the general health of hair.

这节课将涵盖关于头发的好几点知识：毛发的结构以及影响头发整体健康的因素。

youdao

We're talking of course about hair.

当然，我们说的就是头发。

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During this period, hair grows at a rate of about three tenths millimeters a day, or one centimeter a month.

VOA: special.2011.04.05

The men seeing themselves in Tuttle's mirrors began to take more care about their hair, beards and clothing.

VOA: special.2009.06.06

She was about 50 years old. Her white hair was pulled back from her small, tired face.

VOA: special.2009.01.17

He told BBC News that the journal article described everything needed to establish the test in a forensic lab, but that the team was also in touch with industry regarding their knowledge about hair and eye colour prediction.

BBC: Forensic test can predict hair and eye colour from DNA

My own hair is straightened and has been for more years than I can remember, but when I wore my hair in braids, I would consistently encounter people asking a million questions about my hair.

FORBES: Is Your 'Natural' Hairstyle Preventing You from Getting a Job?

One of the biggest complaints older women have about their hair is that it gets thinner.

WSJ: Old Hair Days: Products to Help Manage Gray and Thinning Hair