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What this means is that our lips have little to no protection from the environment, and their main source of moisture is the saliva that comes from our mouths.
這就說明嘴唇易受環(huán)境影響，而嘴唇水分大多是來自嘴里的唾液。
What’s more, unlike much of the rest of our body, our lips are almost always on display, and rarely covered by clothing.
此外有別于身體其他部位，嘴唇直接暴露在外面。
As a result, the moisture on our lips is continually evaporating.
結(jié)果就造成嘴唇的水分一直在蒸發(fā)。
And that’s before we take into account exposure to sun, wind, cold, and air-conditioning.
我們的嘴唇還要暴露于陽光、大風、冷空氣及空調(diào)環(huán)境。
Plus, if you’re sick or have allergies, and your nose is congested, your lips end up drying more quickly because you tend to breathe through your mouth.
此外，如果你生病或者過敏而鼻塞，嘴唇會干得更快，因為你不得不大口呼吸！
