Sometimes however, gases mix together in ways that aren't so predictable.

然而， 有时气体以不可预测的方式混合在一起。

19.Well, um, when crude oil has a lot of natural gas mixed up with it, it's called live oil.

嗯，当石油里混有大量的天然气，这就叫做活的石油。

It'll eventually settle in the glass, but it's so fine that even the tiny currents that occur as the two gases mix are enough to toss it around a little.

它最终会沉淀在玻璃杯中，但它非常细腻， 即使两种气体混合时产生的微小电流也足以将其稍微搅动一下。