“如果你真的想知道什么玩意长什么样，方法只有一个，”怀特说。
"If you really want to know what something was like, there's only one way," White said.
你知道如果yB等于0，即我们只有纯的。
A you know that if yB is equal to zero, that you have pure a.
他说：“如果你不知道这些地方并且你也没有任何在冰川环境的生存经验的话，在只有2至3摄氏度的温度时，就可能会是很危险的。”
He said: 'in temperatures of just 2-3c or below it can be dangerous if you don't know the place and if you don't have experience in an ice environment.
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