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。

youdao

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。

youdao

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。

youdao

Ms von Lange, who has been dubbed literature's answer to the Spice Girls, saves her novel from sounding too condescending and portentous by injecting a heavy element of comedy into a book intended to upset the grown-ups.

ECONOMIST: Post-wall German fiction

Still, the search for better batteries is an endless one, and Dr Pyykko's discovery might prompt some new thinking about what is possible in this and other areas of heavy-element chemistry.

ECONOMIST: Einstein and car batteries

Mr. DIAMOND: That's true, and we have many different type of wars, and one of them is an insurgency against the new political order with a heavy terrorist element that aims to strike at Europe and the United States.

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