Tā yīngnián zǎoshì, méi néng kàndào zìjǐ de yánjiū chéngguǒ fābiǎo.
He died in his prime and never saw his research published.
Tips
usage
英年早逝 is used specifically for talented or notable individuals who die young, carrying a sense of lamentation at unfulfilled potential. It is not used for ordinary early deaths.