Healthy sinuses are lined with a thin layer of mucus that traps dust, germs, and other particles in the air.
健康的鼻窦里排列着一层薄薄的鼻涕,这些鼻涕能够吸附灰尘,细菌以及其他空气中的微粒。
Healthy sinuses are lined with a thin layer of mucus that traps dust, germs, and other particles in the air.
健康的鼻窦里排列着一层薄薄的鼻涕,这些鼻涕能够吸附灰尘,细菌以及其他空气中的微粒。
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