The main precursor to plastic is a byproduct of petroleum refining called hydrocarbon gas liquids.

塑料的前身是石油提炼的副产品，被称为液化烃气。

We must keep honing and refining until we find that noun, verb or adjective.

们必须不断地推敲，直到找到这个词为止。

Despite the past glories, Dehua craftsmen never stop refining their skills.

德化白瓷艺术历久弥新，有赖德化工匠一直以技艺追求益求。

Extracting, processing and refining these types of minerals can be very expensive and time-consuming.

开采、加工再提炼这些矿物成本极高，还非常费时费力。

Gelder is vice president of refining at consulting company Wood Mackenzie.

盖尔德是咨询公司Wood Mackenzie炼油业务的副总裁。

I spent a lot of time refining the forms.

花了很多时间完善这些造型。

But mining and refining lithium can threaten the natural environment and contribute to pollution.

但开采和提炼锂会危害自然环境，造成污染。

Well again, we've got to be careful about refining this.

同样 们得谨慎提炼这些理论。

Is it the cost of crude oil, taxes, refining and profits or distribution?

是原油价格, 税收, 提纯和利润还是分配?

Then there's the cost of refining the gas. That adds $1.12 per gallon.

然后还有提炼汽油的成本，每加仑再加上1.12美元。

That includes refining the gas, also transporting it and the profits for those companies.

这包括提炼与运输汽油以及这些公司的利润。

Before that, oil refining ability had not fallen in any year for at least 30.

在此之前，炼油能力至少有30没有下降过。

Rockefeller targets a byproduct of refining oil that for years has been thrown away.

洛克菲勒看准了炼油中的一种副产品 很多 它都被当成废物丢掉。

It's a cycle, meaning you're constantly refining.

这是一个循环，意味着你需要不断改进。

The Iranian Petroleum Minister says the country has started refining its crude oil in Venezuela.

伊朗石油部长表示，该国已经开始在委内瑞拉提炼原油。

You have to read widely, constantly refining and redefining your own work as you do so.

你必须得广泛阅读涉猎，同时不断练并且重新定义自己的作品。

Well, those refining costs and profits are the smallest slice of what you pay at the pump.

好吧，那些炼油成本和利润是你在加油站支付的最小的部分。

Now it is not perfect, and I'm going to spend the rest of my life refining it.

这个框架不是完美的，会用余生不断完善它。

Refining profits are at high levels, notwithstanding the recent imposition of a windfall tax by the government.

尽管政府最近征收了暴利税，但炼油利润仍处较高水平。

Aramco says the profits were driven primarily by higher crude oil prices, volumes sold and higher refining margins.

沙特阿美表示，利润主要自原油价格上涨、销量和炼油利润率上升的推动。