From the beginning, the cloud hanging over the whole hydrogen enterprise has not been the power source as such, but the intractable difficulty of distributing and storing the stuff.
从一开始，盘旋在氢能源开发企业头上的阴云已经不是像这样的动力来源的问题，而是那些棘手的配送和储存原料的难题。
The technique worksbecause when water evaporates at sea, a combination of hydrogen and oxygenisotopes rise to form a cloud, which then releases rain when it moves inland.
这项技术的确有效，因为当水从海中蒸发后，氢和氧的同位素升起形成云，接着当它飘至陆地上空时再变为雨。
Molecular hydrogen (H2) radiated the heat out of the clouds, so we need to know how much H2 was in the cloud.
氢分子(H2)在初生云周围散射热量，因此我们要知道在初生云中氢分子的数量。
A star is made when a huge cloud of mostly hydrogen gas collapses.
当一个主要由氢气组成的星气团崩解时，一颗星星就形成了。
It was during the Dark Ages that the universe cooled enough to allow molecular hydrogen to form, filling the cosmos with a diffuse cloud of electrically-neutral gas.
早期期间宇宙冷却到足以使一种弥漫的电中性气体云充满了宇宙的分子氢形成。
The oxygen and hydrogen in that cloud would have combined to create at least some water, which would also have been mixed into the matrix of the asteroid.
这种气团里的氢气和氧气会化合产生一定量的水，这些水混合在小行星中。
A molecular cloud is a region containing cool interstellar gas and dust left over from the formation of the galaxy and mostly contains molecular hydrogen.
分子云是一个包含冷却星际气体和尘埃的区域，这些气体和尘埃是星系形成之后的残留物，主要由氢分子组成。
The wispy pink and yellow cloud in the new Hubble photo, which scientists released Tuesday, is made of mostly hydrogen gas heated by fierce ultraviolet radiation from the new stars at its heart.
在科学家周二发布的新哈伯照片中，微弱的粉色和黄色星云是大部分是由星云中心的新星发射的紫外线加热的氢气组成。
The technique works because when water evaporates at sea, a combination of hydrogen and oxygen isotopes rise to form a cloud, which then releases rain when it moves inland.
这项技术很有效，因为当水从海里蒸发，氢和氧的同位素组合升空形成云，接着飘至陆地上空降雨。
It begins with Maarten Schmidt who hypothesized that star formation rate (SFR) was related to the surface density of atomic hydrogen gas in the cloud.
最早是MaartenSchmidt猜测恒星形成率(SFR)与云层中氢原子气体密度有关。
If so, then the properties of the waves suggest that the ratio of oxygen to hydrogen in the water cloud where the waves propagated is 10 times as high as in the sun.
若果真如此，则这些波动的性质暗示了传递波动的液态云的氧氢比例，为太阳中的10倍。
Taking the hydrogen atom as an example, the author designs a precise, speedy and convenient application program to draw the atomic orbital and electronic cloud with MATLAB language.
以氢原子为例，以MATLAB为程序开发语言，设计了一种精确、快速、简便地绘制原子轨道和电子云图形的应用程序。
Taking the hydrogen atom as an example, the author designs a precise, speedy and convenient application program to draw the atomic orbital and electronic cloud with MATLAB language.
以氢原子为例，以MATLAB为程序开发语言，设计了一种精确、快速、简便地绘制原子轨道和电子云图形的应用程序。
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