多汗症是指身体一个或多个部位出汗过多。
Hyperhidrosis is excessive sweating on one or more parts of the body.
这类产品最主要的功能就是防止在冬季跑步的时候过多的汗集结在你的身体周围（如果你穿棉织品，这种事就会经常发生）。
One of the key goals of cold-weather running is to avoid excess sweat buildup (which often occurs if you wear cotton clothing.)
出汗是很好的降温系统。但是，如果你在天热的时候出了很多汗，你就可能流失过多的水分。
Sweat is a great cooling system, but if you're sweating a lot on a hot day, you could be losing too much water.
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