原级：moustache
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1. Moustaches have long held an important place in Indian culture, seen as a symbol of virility.
2. But moustaches are a mystery, to evolutionary biologists and to practically everyone else.
3. Men across the world have been embracing the lost art of moustaches this month in the name of charity.
4. The male students cannot sport long hair or moustaches, while women with long hair must wrap or braid it.