The particles are generally protons , electrons and helium nuclei and when they collide with nuclei in the Earth's upper atmosphere they can produce shower s of daughter particles.
这些粒子主要是质子、电子和氦原子核，并且当他们与地球高层大气中的原子核碰撞，就能产生次级粒子簇射。
In general, the heavier atoms in the atmosphere sink and the light ones remain at the surface, which is why some white dwarfs, for example, have mostly pure hydrogen or helium atmospheres.
总体来说，较重的原子在大气圈中沉积，而较轻的原子则存在于大气圈表面，这也是一些白矮星具有较纯净的氢和氦大气圈的原因。
An atmosphere composed of a cold gas mix that is lighter than helium and not much heavier than hydrogen, means that hot-air ballooning will need to be used.
一个由寒冷气体混合比氦要轻但是不会比氢重很多的大气层，意味着热气球将需要使用。
There are only two places to find Helium. The first is the Earth's atmosphere.
仅有两个地方能找到氦，一个地方是地球的大气层里。
He has spent two decades and nearly $20 million in a quest to fly to the upper reaches of the atmosphere with a helium balloon, just so he can jump back to earth again.
他把他过去20年的时光用来尝试做一件事情：乘坐氦气球飞到大气层的外缘，然后从那里纵身一跃，跳回地球。 为实现这个目标，20年来他已花费2000万美元。
Airship: a giant helium balloon would pump chemicals into the atmosphere via a 23km hose attached to the ground.
一个巨大的氦气球将化学物质通过一个与地面连接的23千米长的软管将化学物质泵到大气层中。
Uranian atmosphere, by composition, is 83% hydrogen, 15% helium and 2% methane although traces of other hydrocarbons have been found.
天王星大气的组成，是83%的氢，15%的氦和2%的甲烷等碳氢化合物虽然已发现的痕迹。
The atmosphere is largely composed of hydrogen and helium, plus small amounts of methane (which is responsible for the blue hue because it absorbs red light).
这里的气氛主要是由氢和氦，以及少量的甲烷(这是为蓝色色调，因为它吸收红光负责)。
The particles are generally protons, electrons and helium nuclei and when they collide with nuclei in the Earth's upper atmosphere they can produce showers of daughter particles.
这些粒子主要是质子、电子和氦原子核，并且当他们与地球高层大气中的原子核碰撞，就能产生次级粒子簇射。
The Earth's atmosphere is composed of; nitrogen 78%, oxygen 21%, argon 1% and traces of carbon dioxide, neon and helium.
地球大气层的组成，氮的78％，氧气21％，1％，氩气，二氧化碳，氖和氦的痕迹。
They would fill a spherical weather balloon, available online, with helium and float the entire cooler-camera-cell-phone apparatus high into the atmosphere.
他们将填补球形气象气球，在网上与氦，以及浮动整个冷却器，相机，手机设备到大气中的高。
So, it has an atmosphere of light-weight elements: hydrogen and helium.
因此，它的大气层由重量很轻的元素：氢和氦构成。
Balloon: Large airtight bag filled with hot air or a lighter-than-air gas such as helium or hydrogen that can rise and float in the atmosphere.
气球：一种大型气密球囊，内充热空气或轻于空气的气体（如氦或氢），以产生浮力，可在大气中上升和飘浮。
Measurements can be performed in a vacuum or helium atmosphere.
测量可在真空或氦气氛中进行。
The atmosphere at high oxygen partial side of the membranes is air or oxygen, but high purity helium at low oxygen partial side.
膜的高氧分压侧分别是空气或氧气，低氧分压侧是高纯氦气。
Konstantin Batygin and Mike Brown, two CalTech scientists, say the new planet is about 10 times the mass of Earth and has an atmosphere of hydrogen and helium.
两名来自加利福尼亚理工学院的科学家康斯坦丁·巴特金和迈克·布朗，称新行星的质量大约是地球的十倍，其大气中有含有氢和氦。
However, maintaining a proper proportion of helium in the furnace atmosphere is necessary to improve HGM surface smoothness.
但是，在载气中保持适当体积分数的氩气，有利于提高玻璃微球的表面质量和成品率。
However, maintaining a proper proportion of helium in the furnace atmosphere is necessary to improve HGM surface smoothness.
但是，在载气中保持适当体积分数的氩气，有利于提高玻璃微球的表面质量和成品率。
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