元素丰度 即元素的相对含量,是在证认的基础上根据谱线相对强度或轮廓推算出来的。结果表明,绝大多数恒星的元素丰度基本相同:氢最丰富,按质量计约占71%;氦次之,约占27%;其余元素约合占2%。这称为正常丰度。有少数恒星的元素丰度与正常丰度不同,一般说来,这与恒星的年龄有关。
高能物理专业英语翻译A-8-SCIdict学术词典... ... 陨石﹝元素﹞含量 abundance, meteoritic 天然丰度 abundance, natural 核种丰度 abundance, nuclide ...
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由红外光谱和气相色谱法测得天然丰度原料的含氢化合物的解离速率较含氚化合物的解离速率小约10~4倍。
Our results measured by IR spectrum and gas chromatography show that the dissociation rate of hydrogen compound in natural reactant is anbot 10~4 less than deuterium compound.
虽然第四系气源岩有机质丰度较低,但通过生物模拟实验证实可以大量产出天然气。
Although organic abundance of the quaternary gas source is low, a great deal of gas could be produced, demonstrating with organism simulation testing.
提出苏里格气田生烃面积虽大,但运移效率低是天然气储量大但资源丰度低的主要原因。
Though Sulige gas field has extensive hydrocarbon generation, low migration efficiency is the main reason that the Sulige gas field has large reserves but low reserves abundance.
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