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In a testing of petrolic engine, about 70% to 80% of nonmethane hydrocarbon is emitted into atmosphere without catalysis conversion in theoment of coldstart, so that serious pollution is produced.

在汽油机的一个测试循环中,约占排放染物总量70%~80%的非甲烷碳氢化合物是在汽油机冷起没有经催化转化而接排入大气中,造成染。

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The function of hydrocarbons and nitrogen oxides in photochemical smog formation and the formative process of ozone and peroxyacetyl nitrate are discussed.

介绍了氮氧化物、碳氢化合物在形成光化学烟雾中的作用和臭氧、过氧乙酰硝酸酯产生的过程,并介绍了光化学烟雾的形成机理。

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States the latent hazardness of such hydrocarbons as acetylene in air separator, and presents the preventive measures in normal production.

阐述乙炔以及碳氢化合物在空分装置中具有的潜在危险性,并提出在正常生产中的预防措施。

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活大爆炸 第9季

They're basically pure hydrocarbons soaked in fat. Let's hope the lug nut expands.

基本就是沾满油的纯碳氢合物,希望轮爪螺母可以膨胀。

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Crash Course 天文篇

Titan has wind-sculpted dunes, but they're made of hydrocarbon grains, not sand.

土卫六上有许多风塑沙丘,不过它们是由碳氢合物颗粒构成的,而不是沙子。

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CNN 10 英语 20185/6月合集

We're using a bowl of plasma energy in breaking apart hydrocarbon and reaming the carbon down on seeds of diamond, atom by atom CRANE: How long does it take to produce one of these?

我们正在用一份等离子体能量来分解碳氢合物,把碳原子放在制造钻石的基底上,一个原子一个原子地排列。克莱恩: 要多久才能产出这样的产品?

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TED演讲(视频版)双语精选

But what we're talking about here is a pivot from hydrocarbons to heat.

但我们这里在谈的是转移,从碳氢合物转移到热能。

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宇宙奥秘

Since this is a world full of hydrocarbons, but with an oxygen deficit, which would be needed to burn the hydrocarbons, energy and transport on Titan will be arranged quite differently from that here on Earth.

由于这是一个充满碳氢合物的世界,但是缺少氧气,这将需要燃烧碳氢合物,在土卫六上的能源和运输将会与在地球上完全不同。

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经济(汇总)

The world is hungry for its hydrocarbons.

世界对碳氢合物如饥似渴。

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科60秒-科美 20226月合集

The bees developed distinct microbiomes-and they also produced different cuticular hydrocarbon scents.

蜜蜂产了不同的微物群--它们也产了不同的表皮碳氢合物气味。

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Kurzgesagt 科普动画(双语精选)

The abundance of hydrocarbons in the Amazon burn to form ash, are cast into the atmosphere, darting the sky and keeping sunlight from reaching the surface, dropping temperatures to near freezing worldwide.

亚马逊地区丰富的碳氢合物燃烧形成大量灰烬,并被扬到大气层中,灰尘颗粒会遮挡阳光到达地表,世界各地的气温几乎降至冰点。

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PBS趣味科普

We also need to use chemistry to figure out how to convert one plastic type into another plastic type, or even convert plastic into other useful hydrocarbons like fuel.

我们还需要使用知识来弄清楚如何将一种塑料转为另一种塑料,甚至将塑料转为其他有用的碳氢合物,如燃料。

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Scishow 精选系列

Usually, the hydrocarbon molecules are extracted from fuels, like crude oil, or natural gas, then linked up, forming big, repeating structures called " polymers" .

通常,碳氢合物分子是从燃料中提取出来的,像是原油、天然气,然后它们会连接起来,组合成一个巨大的、循环往复的聚合物的链条。

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双语版 TED-Ed 演讲精选

This creates hydrocarbons, the source of energy in fossil fuels — but without any emissions if the fuels are made using clean electricity.

这样产了碳氢合物,即石燃料的能源——但不产排放,前提是使用清洁电力产燃料。

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经济(汇总)

If all this came to pass, then hydrogen would become a dominating factor in human life in the way that hydrocarbons currently are.

如果这一切都实现了,氢就会像现在的碳氢合物一样成为类活中的一个主导因素。

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科大揭秘

Gasoline engines emanate more greenhouse gasses, such as hydrocarbons and carbon monoxide, thereby contributing to environmental pollution.

汽油发动机排放更多的温室气体,如碳氢合物和一氧碳,从而造成环境污染。

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经济(汇总)

For the hydrocarbons that make up aviation fuel an industrial chemist would normally turn to what is known as the Fischer-Tropsch process.

对于构成航空燃料的碳氢合物,工业家通常会采用费托合成的方法。

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VOA Standard 20152月合集

But low oil prices are a stimulus to chemical producers that use hydrocarbons to make everything from solvents to fertilizer and plastics.

但是低油价对于使用碳氢合物制造溶剂、肥料及塑料的产商们也是一种刺激。

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如何避免气候灾难

You can break apart the hydrogen from the oxygen in water, and then you can reform them to make hydrocarbons.

你可以将氢从水中的氧中分解,然后你可以将它们转为碳氢合物。

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经济-综合

SCRATCH the surface of the planet and the chances that hydrocarbons will spew forth appear to grow by the day.

挖开地表层,碳氢合物立即喷薄而出,这种情况越来越常见。

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VOA Standard 20143月合集

Kelvin Kemm, a South African nuclear physicist, said Africa needs to look beyond traditional sources, such as water and hydrocarbons.

Kelvin Kemm是南非核物理家,他说非洲需要寻找水和碳氢合物等传统能源之外的能源。

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VOA Special 20231月合集

He said that one kilogram of hair can absorb seven to eight liters of oil or similar chemicals called hydrocarbons.

他说,一公斤头发可以吸收七到八升油或类似的碳氢合物。

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科大揭秘

Common combustion products include hydrocarbons, oxides of nitrogen and sulfur, ammonia and particulate matter.

常见的燃烧产物包括碳氢合物、氮和硫的氧物、氨和颗粒物。

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