这些分子燃烧起来比汽油更干净，部分原因是它们的碳-碳键更少（如果有的话），而且它们排放的碳氢化合物不太可能产生臭氧。
These molecules burn more cleanly than gasoline, in part because they have fewer, if any, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone.
这些分子燃烧起来比汽油更清洁，部分原因是它们的碳-碳键更少或者不存在，而且它们排放的碳氢化合物产生臭氧的可能性更小。
These molecules burn more cleanly than gasoline, in part because they have fewer, if and, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone.
汽油中的能量来自碳氢化合物。
任何一种简单醇类都是有大量的碳分子和氢分子(如同碳氢化合物，譬如汽油)以及单个氧原子组成。
Any simple alcohol is composed of a number of carbon and hydrogen atoms (like a hydrocarbon such as petrol) together with a single oxygen atom.
它们具有的另一个优势在于，它们中有些是纯粹的碳氢化合物，类似与汽油。
They have the additional advantage that some are pure hydrocarbons, like petrol.
燃烧碳氢化合物(天然气和汽油)会产生水和CO2。
Burning hydrocarbons (natural gas and petrol) yields both water and CO2.
这些分子要比汽油燃烧得更为清洁，部分是因为他们碳-碳键较少，而且即使会释放出碳氢化合物，也不太可能会成为臭氧。
These molecules burn more cleanly than gasoline, in part because they have fewer, if any, carbon-carbon bonds and the hydrocarbons they do emit are less likely to generate ozone.
阐述了汽油机冷启动过程中碳氢化合物排放较高的原因，以及在降低碳氢化合物排放的问题上主要采取的措施。
The paper describes the reasons of higher emission of hydrocarbon in the process of gasoline engine cold start. It also discusses the measures adopted mainly in reducing emission of hydrocarbon.
石化系统运输储存的汽油等石油产品是多种碳氢化。
Petrochemical transportation and storage of gasoline and other petroleum products are a variety of hydrocarbons.
它具有的性能特性，包括弹性，韧性和耐磨损性优良的耐化学性之间取得平衡，以汽油，石油和其他碳氢化合物的总和。
It possesses a balance of performance properties including flexibility, toughness and abrasion resistance combined with excellent chemical resistance to gasoline, oil and other hydrocarbons.
在汽油机的一个测试循环中，约占排放污染物总量70%～80%的非甲烷碳氢化合物是在汽油机冷起动阶段没有经催化转化而直接排入大气中，造成严重污染。
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，约占排放污染物总量70%～80%的非甲烷碳氢化合物是在汽油机冷起动阶段没有经催化转化而直接排入大气中，造成严重污染。
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.
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