10（歳）代後半: late 10s 20（歳）代後半: late 20s [twenties] 30（歳）代後半: late 30s [thirties] 40（歳）代後半: late 40s [forties] 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] 50代後半で: in one's late 50s [fifties]〔年齢が〕 50代後半に: in one's late 50s [fifties]〔年齢が〕 50歳: fifty 10代後半: late teens 20代後半で: in one's late 20s [twenties]〔年齢が〕 20代後半に: in one's late 20s [twenties]〔年齢が〕 30代後半で: in one's late 30s [thirties]〔年齢が〕
