The colder the air, the less moisture it contains, which can mean dry eyes, causing the cells that produce tears to shut down to protect themselves from the irritation.
空气越冷就越干燥，这就会导致眼睛干涩，分泌泪水的细胞为了免受刺激会暂停运作。
2
The spots arise when groups of cells begin producing pigment in response to repeated stress or irritation of the skin.