During fractional distillation, hydrocarbons are separated according to their......- Melting point.

馏过程中烃类是以什么离开？- 熔点。

Stark and his colleagues found high concentrations of hydrocarbons — compounds found in fuels — and heavy metals, such as lead, copper and zinc.

斯塔克他同事发现了高浓度烃类化合物（燃料中）重金属，如铅、铜锌。

And when those double and triple bonds appear, we've got whole new classes of hydrocarbons.

而当这些双键三键出现时，我们就有了全新烃类家族。

And this can be really important in fields like petroleum geology, because it can reveal whether sediments ever got hot enough for organic hydrocarbons to be converted into oil and gas.

这在石油地质学等领域非常重要，为它可以揭示沉积物是否曾经达到足够高温度， 使有机烃类转化为石油天然气。

Therefore, these simple hydrocarbons are pretty nonpolar and their electrons are distributed evenly over the molecule, which is why, you know, oil and water don't mix.

此，这些简单烃类物质是非极性，它们在整个中布得很均匀，这就是为什么油水不会混合原。

For example, an increase in UV sunlight would increase the photolysis of methane gas, hence the production of hydrocarbons and associated hazes.

例如， 紫外线阳光增加会加速甲烷气体光解，从而产生烃类相关霾。

The process involves combining hydrogen with carbon to produce various hydrocarbon fuels, such as diesel, petrol or jet fuel.

该过程涉及将氢气与碳结合， 以生产各种烃类燃料，如柴油、汽油或航空煤油。

These researchers were working a nanotechnology-based catalyst to try and convert CO2 into a different hydrocarbon, like methane gas.

这些研究人员正在使用基于纳米技术催化剂，试图将二氧化碳（CO2）转化为不同烃类，比如甲烷气体。

Its high-pressure steam drove the engine pistons in virtual silence, in contrast to clattering gas engines which emitted the aroma of burned hydrocarbons.

其高压蒸汽几乎无声地驱动发动机活塞，与发出燃烧烃类气味嘈杂汽油发动机形鲜明对比。

And if you do that, you can actually increase the boiling point of other hydrocarbons dramatically.

而且如果你那样做，实际上可以大幅提高其他烃类沸点。