查询词典 hydrogen

The researchers detected hydrogen cyanide molecules in disks circling yellow stars like our sun -- but found none around cooler and smaller stars, such as the reddish-colored "M-dwarfs" and "brown dwarfs" common throughout the universe.

研究人员在类似太阳的黄色恒星周围的星云盘中检测到了HCN，但在更冷更小的恒星——比如遍布宇宙的M型红矮星和棕矮星——周围却没有找到HCN踪迹。

The researchers detected hydrogen cyanide molecules in disks circlingyellow stars like our sun -- but found none around cooler and smallerstars, such as the reddish-colored "M-dwarfs" and "brown dwarfs" commonthroughout the universe.

研究人员在类似太阳的黄色恒星周围的星云盘中检测到了HCN，但在更冷更小的恒星——比如遍布宇宙的M型红矮星和棕矮星——周围却没有找到HCN踪迹。

Fluorescence emission spectra and UV absorb spectra analysis have been undertaken to test the influence of solvent polarity on the lowest excited singlet state of the tertiary amines. The absorption maxima were red-shafted slightly, and the emission maxima were red-shafted strongly, which showed all of the three compounds were found to be essentiallyππ* in character, which makes for the formation of triplet-exciplex state and the subsequent reactions,?known as photo-reduction and hydrogen-abstraction.

本文借助光谱检测的手段测试了新合成的增感剂的光物理化学性能，利用荧光发射光谱和紫外吸收光谱测试了溶剂极性对叔胺的最低激发单重态的影响，实验结果表明叔胺的紫外最大吸收波长随溶剂极性的增强产生轻微的红移，荧光最大发射波长随溶剂极性的增强产生明显的红移，表明三种叔胺的最低激发单重态具有ππ*跃迁的特性，这对于激态复合物的生成以及其后的光致还原反应和提氢反应的发生都非常有利。

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公司生产的&腾闽&牌高级吸音板，目前已发展为安全防火、零甲醛、天然木丝、天然木皮、时尚金属、幻彩油漆、布艺软包、三聚氢氨环保型等8大系列100多个品种。

At that time, it was group of innovative and creative people such as him who pioneered China 's research on atomic bombs, hydrogen bombs, guided missiles and satellites.

那个时候，就是这样一批有创新精神的人把中国的原子弹、氢弹、导弹、卫星搞起来的。

The A4 rocket motor was the first design that successfully moved large volumes of fuel to the combustion chamber using gas-turbine driven fuel pumps. The gas-turbine was powered by hydrogen peroxide, of which 130 litres were contained in the small ellipsoidal tank.

V2里的—A4火箭推动器的成功设计是其能在很短的时间能将大量的燃料送往燃烧室。130升的小椭圆形油箱提供的过氧化氢推动的燃气涡轮机输送燃料是主要的关键设备。

Hence, the Hindenburg had to start using inflammable hydrogen on its flights.

因此，兴登堡号飞行时开始采用易燃的氢气。

Enzyme that separates the two strands of the double helix by breaking hydrogen bonds between the two strands.

通过打断两条链之间的氢键而将双螺旋的两条链分开的酶。

The hydrogen isotopic composition of heavy hydrocarbon of natural gas is closely related with the sedimentary environments of source rocks.

即随着烃类碳数的增加而富集重同位素。同时天然气重烃的氢同位素组成也主要与源岩的沉积环境有关。

And I keep hearing about things like wind and solar power and hydrogen fuel cells.

我听说像风，太阳能和氢燃料电池这样的东西。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48