Many kinds of molecules make up your coffee There are the water molecules, the flavor molecules the milk proteins, etcetera.
许多不同种类的分子构成了你的咖啡,有水分子,气味分子,牛奶蛋白等等。
If I get you down to a cluster of about 30 water molecules, the boiling point is a function of the size of the water droplet.
如果对于一个由30个水分子,组成的簇,沸点是,水珠尺寸的函数。
You burn methane, and it combines with oxygen to form water, to form CO2.
燃烧酒精,酒精分子和氧气结合形成水和二氧化碳。
And that's all that's big enough to pass through or small enough to pass through. And if we go up even just one row on the periodic table to potassium, what we actually see is now that it's going to be too large, and, in fact, a potassium solvated with one water molecule won't go through our channel.
就是这样刚好大到它通过,或者说刚好小到它通过,即使我们再沿着周期表往下走仅仅一行到钾离子,我们看到的就将是它的个头太大了,实际上,溶解于一个水分子的单个钾离子,不能穿过我们的通道。
Now this behaves very differently in water because part of it is water soluble, this part is, it's a molecule that would like to dissolve in water and part of it is like oil, it doesn't want to dissolve in water.
它们在水中表现出十分不同性质,因为一部分是水溶性的,这一部分是,是一种可以溶于水的分子,而另一部分就像油,不会溶于水中
Water is a very unique molecule.
水是一个特别的分子。
But, let's take a look and see about water.
让我们看看水分子。
Let's take a look at water.
让我们看看水分子。
应用推荐