It, too, is a relatively minor threat: Plutonium is a heavy element that does not dissolve easily in water.
这也是一个不大的威胁：钚是一种重元素并且不易被水溶解。
It's a heavy element produced in thermonuclear explosions of supernovae.
这是一个重元素，产生于超新星的热核爆炸。
This is the most common element in the universe and so could come from many sources, but the fact that it tends to coincide with heavy-element pollution is telling.
氢是宇宙中最普遍的元素，可以有多种来源，但是它总是倾向于与重元素污染并存这一事实才是关键。
It is very significant to Ba stars for heavy-element nucleosynthesis and Galactic chemical evolution.
钡星对于重元素核合成及星系化学演化的研究都有非常重要的意义。
It is very significant to Ba stars for heavy-element nucleosynthesis and Galactic chemical evolution.
钡星对于重元素核合成及星系化学演化的研究都有非常重要的意义。
应用推荐