Hydrogen sulphide bearing gas or water is postulated to be an important reductant in several areas

含硫化氢的气体和水被认为是某些地区的一种主要的还原剂。

属类：综合句库--

Any of various halocarbon compounds consisting of carbon,hydrogen ,chlorine,and fluorine,once used widely as aerosol propellants and refrigerants.Chlorofluorocarbons are believed to cause depletion of the atmospheric ozone layer.

含氯氟烃由碳、氢、氯及氟构成的卤烃化合物，曾经作为喷雾容器中推进剂及致冷剂被广泛使用，含氯氟烃被认为会导致大气臭氧层的枯竭

属类：综合句库--

The process by which heavier chemical elements are synthesized from hydrogen nuclei in the interiors of stars.

核合成较重的化学元素从星球内部的氢核合成的过程

属类：综合句库--

One of the hydrogen atoms of the active methylene group is replaced with a cyclooxy group

活性亚甲基上的一个氢原子是被环氧基所取代的。

属类：综合句库--

An organic compound in which the hydrogen of the hydroxyl group of methyl alcohol is replaced by a metal.

甲基化产物一种有机合成物，是甲醇的羟基中的氢被一种金属取代

属类：综合句库--

If our assumption about the probability factor is correct， this means that E-act is less for abstraction of a secondary hydrogen than for abstraction of a primary hydrogen

假如我们对几率因子的推测是正确的，这就意味着夺取仲氢的E活化比夺取伯氢的E活化小。

属类：综合句库--

General rule of chemical analysis for hydrogen ,oxygen,nitrogen,carbon and sulfur in metal’s materials

金属材料中氢、氧、氮、碳和硫分析方法通则

属类：行业标准名称-国家标准名-GB/T14265-1993

Metallic powders--Determination of loss of mass on hydrogen reduction (hydrogen loss)

金属粉末--在氢中还原时质量损失的测定(氢损)

属类：行业标准名称-国家标准名-GB/T5158-1999

A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen(approximately78 percent)and oxygen(approximately21 percent)with lesser amounts of argon, carbon dioxide, hydrogen , neon, helium, and other gases.

空气一种无色、无嗅、无味的气体混合物，主要由氮气(约占78%)和氧气(约占21%)组成，还有少量的氩、二氧化碳、氢、氖、氦及其它气体

属类：综合句库--

Air quality--Determination of sulfuretted hydrogen ,methyl sulfhydryl,dimethyl sulfide and dimethyl disulfide--Gas chromatography

空气质量硫化氢、甲硫醇、甲硫醚和二甲二硫的测定气相色谱法

属类：行业标准名称-国家标准名-GB/T14678-1993

The second most valuable use of refinery gas is the production of synthesis gas (hydrogen and carbon monoxide)for the manufacture of chemicals such as methanol

炼厂气的第二种最好应用是生产合成气(氢气和一氧化碳)以用来生产化学产品如甲醇。

属类：综合句库--

Refinery gas is mostly methane and hydrogen produced as a by-product in the many refining processes

炼厂气是许多炼油过程中产生的副产品，主要是甲烷和氢气。

属类：综合句库--

Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.

两个氢原子和一个氧原子结合而成一个水分子。

属类：综合句库--

Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.

两个氢原子和一个氧原子结合形成一个水分子。

属类：综合句库--

A process in which naphthas are converted to high-octane aromatics in the presence of hydrogen and a catalyst under pressure and heat.

临氢重整在高温高压下，在氢和催化剂的作用下石油精转化为高辛烷值的芳烃的过程

属类：综合句库--

determination of phosphorus-spectrometric determination of phosphorus soluble in sodium hydrogen carbonate solution

磷的测定-在碳酸氢钠溶液中可溶磷的光谱测定

属类：行业标准名称-试验方法-

The gas tank could be idled with this metallic hydride and the hydrogen driven off by heat as needed.

煤气箱可以贮装金属氢化物，需要时可加热使氢气放出。

属类：综合句库--

Water,you know,is made up of hydrogen and oxygen.

你知道，水是由氢和氧构成的。

属类：综合句库--

The balloon was distended because of filling of hydrogen .

气球因充满了氢气而膨胀。

属类：综合句库--

A process by which the hydrocarbon molecules of petroleum are broken into simpler molecules, as of gasoline or kerosene, by the addition of hydrogen under high pressure and in the presence of a catalyst.

氢化裂解将石油的含氢分子分裂成更简单的分子(象汽油和煤油的分子)的过程，此分裂过程是在加催化剂及高压氢气的条件上进行的

属类：综合句库--

A compound of hydrogen with another,more electropositive element or group.

氢化物氢与另一种电正性较大的元素或基组成的二元化合物

属类：综合句库--

Hydrogen gas is extremely flammable.

氢气是特别易燃的气体。

属类：产品说明书--

Technology market & Development of Hydrogen and Fuel Cell Technology market & Development of Hydrogen and Fuel Cell

氢燃料电池技术市场及发展前景氢燃料电池技术市场及发展前景

属类：综合句库--

Hydrogen is a kind of easily burning gas.

氢是一种易燃气体。

属类：综合句库--

Hydrogen is the lightest element.

氢是最轻的元素。

属类：综合句库--

Hydrogen and oxygen form water.

氢与氧可构成水。

属类：综合句库--

Method of hydrogen ion concentration determination for pesticide emulsifiers

农药乳化剂氢离子浓度测定方法

属类：行业标准名称-国家标准名-GB/T3776.2-1983