高温气体释放出的X射线在这里显示为蓝色,它是由地球同步轨道上运行的钱德拉天文望远镜观测到的。
As indicated in the graphic, the gas giant planets of our solar system - Jupiter, Saturn, Uranus and Neptune - are mostly composed of hydrogen. Image courtesy of NASA.如图所示,我们太阳系中的气态巨行星——木星、土星、天王星、海王星——大部分是由氢构成的。图片来自。
The results indicated that there exists obvious gas gap in molten iron flowing front, and the pressure in gas gap with EPS pattern during vacuum pouring is less than 1 a tm.试验结果表明,铸铁件流动前沿不仅存在明显的气隙,而且采用聚苯乙烯模样材料,负压下浇注时,其气隙压力低于1个大气压。