If a stratum of air saturated with moisture meets a very cold one, the fog begins to freeze, and becomes specks of snow.
如果含水量达到饱和状态的空气遇到了非常冷的另一团空气，空气中的原先呈雾状的水分就开始凝结变成小的雪粒。
From that time till now, the world has always seen a warm season returning after a cold one, just as we see it today.
从那时起直到现在，你总会看到这个世界冬去春来地交替，跟我们今天见到的一样。
Klauer and Eckel cited a recent study done in Japan that exposed two groups of men to cold. One group had brown adipose tissue and the other didn't.
克劳尔和埃克尔援引了最近刚在日本完成的一个研究——将两组男子置于低温环境中，其中一组人有褐色脂肪组织，而另一组人没有。
Days passed, days of rain and cold. One day he came to the bones of a deer. There was no meat on the bones. The man knew wolves must be near.
一天天过去，这些日子一直在下雨，又很冷。一天，他走到一堆鹿的白骨旁边，骨头上一点肉也没有了。狼一定就在附近。
Days passed, days of rain and cold. One day he came to the bones of a deer. There was no meat on the bones. The man knew wolves must be near.
一天天过去，这些日子一直在下雨，又很冷。一天，他走到一堆鹿的白骨旁边，骨头上一点肉也没有了。狼一定就在附近。
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