Heavy water is heavy because the hydrogen in it weighs twice as much as ordinary hydrogen (it has a proton and a neutron in its nucleus, instead of just a proton).
重水之所以重是因为水中氢的重量是普通氢的两倍（它的原子核中有一个质子和一个中子，而不仅仅是一个质子）。
Hydrogen is lighter than air, but compressing it, storing it in tanks and adding all the necessary equipment starts to tip the scales towards heavy again.
氢气比空气轻，但是将它经压缩存储在燃料箱中并添加所有必需设备后飞机又变重了。
This is the DEUT ERIUM PLANT, an automated facility for extracting the heavy isotope of hydrogen from the local water supply.
实际上这是个加工厂一个全自动化的设施通过来从当地水源中提取氢气的重同位素来生产氘气。
Among this group, most of those with traces of heavy elements also have traces of hydrogen.
这类白矮星中有着重元素痕迹者，大多也会有氢的痕迹。
Heavy water gets its name because it contains deuterium, a form of hydrogen that has a neutron in its nucleus as well as the usual proton and thus weighs twice as much as the ordinary sort.
重水因含重氢而得名。重氢是氢原子的一种，其原子核中含有一枚中子，加之正常氢元素中的质子，重量为一般氢原子的两倍。
It is a naturally occurring radioactive form of hydrogen, sometimes known as heavy hydrogen.
氚是氢的放射性形式，有时被称作超重氢。
It suggests to Farihi that both the hydrogen and the heavy elements come from the same source - planetary debris - which would be most likely to hold hydrogen in the form of water.
这一事实向Farihi表明氢和重元素来自同一来源——行星残骸——其很有可能以水的形式保存氢。
Fusing heavy hydrogen isotopes requires lots of energy, partly because the nuclei are positively charged and repel each other.
融合重氢同位素需要大量能量，部分原因是因为原子核带正电并相互排斥。
Red giants are hot enough to turn the helium at their core, which was made by fusing hydrogen, into heavy elements like carbon.
红巨星的温度足够高，可以将其核心中由氢聚变成的氦再转变为重元素，比如碳。
The moon's low gravity also means that water composed of regular hydrogen and oxygen will escape quicker than heavy water, perhaps leading to a concentration of deuterium in the water of the moon.
月球的低重力也意味着由普通氢气和氧气组成水将会比重水更快的消失，可能导致在月球上水的氘含量。
Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin.
研究表明，月球岩石中的水资源比地球水资源包含更多的重氢元素，意即月球水有可能来源于彗星。
Moon rocks show that lunar water has more heavy hydrogen than does terrestrial water, indicating a cometary origin. Christopher Intagliata reports The Apollo moon missions ended almost 40 years ago.
研究表明，月球岩石中的水资源比地球水资源包含更多的重氢元素，意即月球水有可能来源于彗星。
By transforming the combustion model of heavy oil into 100% hydrogen in producing the sheet sodium hydrate, the cost and environmental pollution are all reduced largely.
通过将片状氢氧化钠生产中由重油燃烧模式升温改造为100%氢气燃烧方式，大幅度降低了生产成本，减少了环境污染。
It is a naturally occurring radioactive form of hydrogen, sometimes known as heavy hydrogen.
它是氢气的一种形态，它自然发生放射，有时被人们称为重氢。
According to smelting condition of Baotou iron and steel group, VD refining process should be adopted to reduce the hydrogen content in the heavy rail steel.
根据包钢重轨钢的冶炼条件，采用VD真空处理降低钢液中氢含量是完全必要的。
Compared with hydrogen, oxygen is nearly 16 times as heavy.
氧与氢比较，重量大约是它的十六倍。
This paper discusses the method for measurement of heavy metal (calculate by Pb) by sodium sulphide -glycerine solution instead of saturated hydrogen sulphide solution.
探讨了用硫化钠-丙三醇溶液代替饱和硫化氢水溶液进行重金属(以铅计)测定的分析方法。
The results indicate that methane has the performance of hydrogen resource, and can be capable of upgrading heavy oil.
探索甲烷用作改质重质油氢源的可行性。
The hydrogen content in the molten heavy rail steel was measured in every stages from LD tapping to mould(without the VD refining process).
研究了包钢重轨钢从转炉出钢到结晶器各个工序过程（未经VD真空处理）钢液中氢含量变化。
The hydrogen transfer activities of several modified materials were investigated and co related with the heavy oil catalytic cracking ability and olefin content in cracked naphtha.
考察了多种改性材料的氢转移反应活性及对催化裂化催化剂的重油转化活性及汽油中烯烃含量的影响规律。
The colloidal or molecular catalyst catalyzes upgrading reactions between the heavy oil feedstock and hydrogen and eliminates or reduces formation of coke precursors and sediment.
胶体或分子催化剂催化重油之间的原料和氢气反应和消除提高或降低焦炭前体和沉积物的形成。
Experimental studies on the effect of hydrogen and heavy hydrocarbon on lower explosion limits of gas.
为研究矿井瓦斯中含有的氢气及重烃组分对瓦斯爆炸下限的影响，建立了多组分瓦斯混合气体爆炸实验系统。
The influence of hydrogen sulfide content in recycle hydrogen on the hydrodesulfurization(HDS)of heavy cracked naphtha(HCN)and the performance of sweetening process were studied.
考察了循环氢中硫化氢含量对催化裂化汽油重馏分（HCN）加氢脱硫性能的影响和HCN加氢产物的无碱脱臭处理效果。
The aim was to research an optimum method without saturated hydrogen sulfide solution for limit test of heavy metals in distilled monoglycerides.
研究取消饱和硫化氢溶液的蒸馏单甘酯重金属限量试验的最佳方法。
It can degrade and scale ammonia, hydrogen sulfide, nitrite, heavy metal ions and other harmful substances in pool, and eliminate oil viscosity and foul odor.
降解及络合池塘的氨氮、硫化氢、亚硝酸盐、重金属离子及其它有害物质，消除水体油粘感及去除污臭味。
Among hydrogen donors tested, tetralin has the biggest effect on super heavy oil aqua-thermolysis.
供氢剂中四氢萘对超稠油水热裂解影响最大。
Among hydrogen donors tested, tetralin has the biggest effect on super heavy oil aqua-thermolysis.
供氢剂中四氢萘对超稠油水热裂解影响最大。
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