氢变成氦的时候会释放能量。
太阳一类的恒星在其核心将氢聚变成氦。
Stars like our sun fuse hydrogen in their cores into helium.
它含有非常少的氢和氦。
它也可以按照组成部分被分解——氧和氢。
It could also be broken down into its component parts—oxygen and hydrogen.
锌置换了稀酸中的氢。
水可分解为氢和氧。
Water can be resolved [decomposed] into hydrogen and oxygen.
然后这些装置将氢和氧合成水，并在这个过程中释放电力。
These devices then combine hydrogen and oxygen to make water and liberate electricity in the process.
在另一项演示中，他们为华盛顿大学分析了细菌中的制氢过程。
In another demonstration, they analyzed hydrogen production in bacteria for the University of Washington.
需要改进技术，提高风能、太阳能和氢能在能源等式中的可行性。
Technological improvements are needed so that wind, solar and hydrogen can be more feasible parts of the energy equation.
通过测量一束头发上较重的氢和氧同位素的比例，科学家可以构建一个地理时间轴。
By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.
因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。
Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.
从后来的任务中得到的数据显示，在两极地下不到一米的地方有浓度相当高的氢，由此推断是水。
Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.
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）。
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).
面包含有碳水化合物，这是一种由碳、氢和氧组成的化学物质。
Bread contains carbohydrates, which are chemicals made up of carbon, hydrogen, and oxygen.
氢燃料电池通过氢氧结合产生电能。
Hydrogen fuel cells work by combining hydrogen and oxygen to produce electricity.
如果用纯氢作燃料，副产品只有热和纯水。
If pure hydrogen is used as a fuel, fuel cells emit only heat and water as a byproduct.
主流汽车制造商们也对氢动力愈发感兴趣。
Mainstream manufacturers are also getting interested in hydrogen.
在土壤中存在的氢，将为月球的探访者带来燃料。
The presence of hydrogen in the soil, meanwhile, could provide a source of fuel for lunar visitors.
氢的优势是其结构非常简单：一个电子环绕一个质子。
The advantage of hydrogen is its unrivalled simplicity: one electron circles a single proton.
我们正尝试改进光合作用，以直接在阳光下制造出氢。
We're trying to modify photosynthesis to produce hydrogen directly from sunlight.
最好的核聚变材料有两种，即氢的同位素——氘和氚。
The best fuels for fusion are two types, or isotopes, of hydrogen - deuterium and tritium.
氢也可以通过电解水产生，甚至可能从生物燃料中获取。
Hydrogen can also be created from water using electrolysis and potentially even from biofuels.
再之外是色球层，这一层由于存在的氢元素而略呈红色。
After that is the chromosphere, a layer that looks reddish because of all the hydrogen found there.
这一获得诺贝尔奖的发现产生了铯原子钟和氢微波激射器。
His discoveries, which won him the Nobel prize, led to the caesium atomic clock and the hydrogen maser.
就像大部分其它恒星一样，太阳主要由氢构成，其次是氦。
Just like most other stars, the sun is made up mostly of hydrogen, followed by helium.
当两个氢原子相遇并彼此结合在一起，便形成了氢分子。
H2 is formed when two hydrogen atoms come together and bind to one another to make a molecule.
构成地球生命需要六项基本要素：碳、氢、氮、氧、硫、磷。
Life on Earth requires six basic ingredients-carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus.
有些能量凝结成了粒子，这些粒子组合形成了轻原子如氢和氦。
Some of this energy congealed into particles, which assembled into light atoms like hydrogen and helium.
有些能量凝结成了粒子，这些粒子组合形成了轻原子如氢和氦。
Some of this energy congealed into particles, which assembled into light atoms like hydrogen and helium.
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