For particles to move like this, they need to be a gas or particles of a dissolved substance.

要使粒子像这样运动，它们必须是气体或溶解物质的粒子。

So the structure of the individual molecules determines whether a substance will dissolve and how well it will dissolve.

因此，单个分子的结构决定了一种物质是否会溶解以及溶解的程度。

Because it's already really hot, more than three times hotter than ordinary boiling water, it can dissolve substances that wouldn't normally dissolve in room temperature water.

因为它已经非常热了，比普通沸水热三倍多，它可以溶解通常不会溶解在室温水中的物质。

What Arrhenius discovered, was that water simply dissolves certain substances, like salts, into their constituent ions, which themselves carry the charge.

Arrhenius 发现的是， 水只是将某些物质（如盐）溶解成它们的组成离子，这些离子本身就带有电荷。