Why does salt melt ice?
为什么食盐能让冰块融化？
It lowers the melting and freezing point of water.
是因为食盐将水的熔点和冰点降低了-M0Tc).i-z8。
Oh,OK.Wait,I don't get it. Doesn't that mean the salt make ice colder?
等一下，我不明白6g0JVueA!b2_。这就意味着食盐让冰的温度变得更低吗？
Let me explain.Pure water freezes at thirty-two degrees Fahrenheit,right?
我解释一下|aOx1~,_DW。纯净水的冰点是32华氏度，对吧？
At that temperature we can say that the rate of freezing is the same as the rate of melting.
这个温度既是冰点也是熔点bFqCX9afD4&9Lf9bc.。
So in other words, at water's freezing point there's a sort of equilibrium between freezing and melting.
也就是说，水的冰点就是结冰和融化的平衡5LXSTLkkiT*DP1^。
Right.Throwing salt on ice upsets the balance.
是的%6IZToK^=nB+Hm62。在冰上洒盐扰乱了这种平衡)@&oWNu%XuM-3mY。
Upsets it how?
怎么打乱的呢？

The salt dissolves into the liquid water, which means that some of the water molecules are replaced by salt.
盐溶解在水中，就是说一部分水分子被盐取代了.%2%Bj])T(。
Since there are now fewer liquid water molecules to be captured and frozen by the ice, the rate of freezing drops.
既然结冰的液态水分子减少了，冰点自然降低了y,7Gl#Xbj*nRxl~dPO。
I think I get it.And Since the rate of melting stays the same, there's more melting going on than freezing.
我明白了+Jj2[,37nCka~_mqDq]。水的熔点不变，融化的水分子比结冰的多，
And so the ice melts.
所以冰块就融化了;F98.G9@g-s。
Right.Interesting.
对%Zdng)jOO8e。很有趣@rpKZssZQz。
In fact, anything that dissolves in water will do the trick.
其实，任何溶于水的物质都可以使冰融化qZv~gPs-aDS#@YyF-+。
You could pour sugar on ice and it will melt.
把糖洒在冰上，冰也会融化msZuudO%3bwNA%R4t^k。
But I guess since salt is cheaper it's used more often.
但是我想也许由于盐比较便宜，所以经常被使用mCvc*Ud)sOR@1+w==。