Rather burn out than rust out.

宁为烧尽,不愿锈坏.

Better to wear out than to rust out.

宁可用坏,不可锈坏.

They say they'd rather burn out than rust out.

他们说他们宁愿累死也不愿意被淘汰。

It's just like, no, it's exactly like oxygen binding to iron and making it rust. So you age because you rust out.

这有点像，不，应该说这和氧与铁结合使其生锈是完全相同的道理。所以说你会衰老是因为你生锈了。