10（歳）代後半: late 10s 20（歳）代後半: late 20s [twenties] 40（歳）代後半: late 40s [forties] 50（歳）代後半: late 50s [fifties] 60（歳）代後半: late 60s [sixties] 70（歳）代後半: late 70s [seventies] 80（歳）代後半: late 80s [eighties] 90（歳）代後半: late 90s [nineties] 30代後半で: in one's late 30s [thirties]〔年齢が〕 30代後半に: in one's late 30s [thirties]〔年齢が〕 30代後半の女性: woman in her late thirties 30代後半の男性: man in his late thirties 30（歳）代半ばから後半: one's mid- [mid] to late thirties〔人の〕 30歳: thirty 10代後半: late teens
