According to the verified data, the model presented in this paper characterizes its higher credibility in the process of natural thinning of Betla Luminifera population.

经实测资料验证，笔者提出的模型在拟合光皮桦种群自然稀疏过程中，均具有较高的可信度。

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An option for men who experience hair thinning or hair loss, hairpieces can be made from either synthetic or natural hair, and are usually glued to the scalp.

假发是经历头发稀疏或头发脱落的男士的一种选择，它可以是人造的或自然的头发做的，而且通常被粘在头皮上。

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So unless you're starting to notice visible thinning of your hair or bald spots on your scalp, chances are the loss is nothing more than natural, everyday shedding.

所以，除非你的头发开始明显地变少或开始出现秃点，那就可能是头发出了状况，不再如自然般健康了。

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