Salts lower the freezing point of water, as anyone knows who's thrown salt on an icy sidewalk.

可以降低水的凝固点，在寒冷的冬季向多滑的地面和过道撒就是利用的个原理。

Don't worry, Alice! In this case, because of the incredibly high pressure in the core, the freezing point of iron is actually about 6000 degrees!

别担心，爱丽丝！由于地心处的极高压力，铁的凝固点高达6000！

The sugar sucrose sets the standard for PAC, which corresponds to how much the freezing point is depressed by, say, one pound of sucrose dissolved in 100 pounds of water.

蔗糖为PAC设定了标准，它对应于溶解在100磅水中的一磅蔗糖降低多少凝固点。