血液已经开始凝结。
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。
If a stratum of air saturated with moisture meets a very cold one, the fog begins to freeze, and becomes specks of snow.
2010年的人口普查凝结了很多自上世纪就开始的趋势。
The 2010 census solidified many trends that began in the past century.
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