Physical activity is an important factor in maintaining fitness.
体育活动是保持健康的一个重要因素。
Vitamins: an important factor is the fitness hair, and hair growth are closely related.
维生素：是头发健美的重要因子，与头发的生长有密切关系。
Vitamins: an important factor is the fitness hair, and hair growth are closely related.
维生素：是头发健美的重要因子，与头发的生长有密切关系。
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