Now in this particular reaction, I've got hydrogen gas, iron solid. Those already are elements in their most stable forms at room temperature and pressure.

特定的反应中，我有氢气,固态铁，这些都已经是,处于室温和常压下,最稳定的元素单质。

麻省理工公开课 - 热力学与动力学课程节选

Instead, these giants may simply have dumped all their contents back into space, dispersing heavy elements like iron equivalent to the mass of 10 of our Suns.

BBC: Astronomers detect 'monster star'

In 1957, he and three colleagues wrote a paper showing how elements heavier than iron are produced.

ECONOMIST: Sir Fred Hoyle

In theory, making elements up to iron should not be hard.

ECONOMIST: Sir Fred Hoyle