一项由美国研究者们发表在科学杂志上的研究，就阿波罗号从月球返回地球后，带来月球上许多氯的同位素进行了分析。
A study by US researchers, published in Science, analysed chlorine isotopes of the much-studied samples, brought to Earth by the Apollo space missions.
但是研究团队发现在月球上氯的同位素的比率大约是地球上的25倍。
But the team found that on the Moon it was about 25 times that of the terrestrial chlorine isotope ratio.
天文学家想在月球远端放置射电望远镜；能量学家想提取月球上的氦3这种可以驱动清洁融合反应器回到地球的同位素。
Astronomers talk of placing a radio telescope on the moon's far side; energy experts want to mine the moon's helium 3, an isotope that could power clean-fusion reactors back on Earth.
不过这一最新的研究发现，太阳风当中的氧和氮同位素比例与地球、月球或火星上的比例不同。
But the new study shows that the ratio of oxygen and nitrogen isotopes found in the solar wind is different from the ratio here on earth, or on the moon or Mars.
氘是氢的同位素，在地球上的海洋中广泛存在，其质量较重，很难逃离金星大气。
Deuterium is a heavier form of hydrogen that is common in Earth's oceans and that would have too much mass to escape Venus' atmosphere.
地球上没有稳定同位素的最轻的物质是什么？
What is the lightest element on Earth, with no stable isotope?
他还说到，底线是“我们意识到的能够引起这么多同位素离散的过程是，月球上的氢含量比地球少10000到100000倍。”
The bottom line, he says, is that "the only process we are aware of that could cause such large isotope scatter is if the hydrogen content of the moon is 10,000 to 100,000 times less than [on] Earth.
理解运动，模式，以及通过同位素的映射地球上的过程。
Isoscapes: Understanding movement, pattern, and process on Earth through isotope mapping.
但最新的研究显示太阳风中氧氮同位素比例与地球、月球或是火星上的比例并不相同。
But the new study shows that the ratio of oxygen and nitrogen isotopes found in the solar wind is different from the ratio here on earth, or on the moon or Mars.
无机成因天然气与生物成因天然气在地球化学特征上存在显著的差异，主要表现在化学成分和同位素组成特征。
There are some distinct geochemical differences between the organic and inorganic gases, mainly in chemical composition and the composition of isotopes.
无机成因天然气与生物成因天然气在地球化学特征上存在显著的差异，主要表现在化学成分和同位素组成特征。
There are some distinct geochemical differences between the organic and inorganic gases, mainly in chemical composition and the composition of isotopes.
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