Practice: will the tremella basin, with warm water soak for 30 minutes, wait for after the hair pick to take off her head, impurities;

做法：将银耳放入盆内，以温水浸泡30分钟，待其发透后摘去蒂头、拣去杂质；

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Pick a model. Large or small. Short hair or long. New or pre-owned。

按一个标准选。要么大、要么小；要么短毛、要么长毛；要么从小养大、要么是被人养过的……

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After scientists showed the four crows a series of colour photographs of humans with their hair concealed, one pair was trained to pick men's faces and the other pair women's faces.

研究人员给四只乌鸦观看人的一组彩色照片，但把头发隐藏起来，训练一对乌鸦挑选男人照片，另一对乌鸦去选女人照片。

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"It really gets you when you realize someone can pick up a hair on the street and know more about you than a doctor can, conceivably, " said Ellen Jorgensen, the director of Genspace.

WSJ: Art Emerges from DNA Left Behind

Hair can also be examined, partly because it will pick up tiny traces of a chemical agent in the atmosphere.

BBC: Syria chemical weapons claims: UK and US tread cautiously