then作时间副词时中文意思是adv. （指过去）当时，（指将来）到那时

I was just a hick from Texas then.那时我不过是从得克萨斯来的土包子。

She left in 1984 and from then on he lived alone.她于1984年离去，从那时起他便独自一人生活。

From then on， she was looked as a hero.