adv.在動(dòng)著；在進(jìn)行中

All in all, he's more learned than he was ten years ago. 總的說(shuō)來(lái)，他比10年前更有學(xué)問了。

He ran away as a boy thirty years ago, and his family has never heard from him since. 30年前他還是孩子的時(shí)候就離開了家，從此，他家里人一直沒有得到他的消息。

I've kept up a friendship with a girl I was at school with twenty years ago. 我一直同工同20年前上學(xué)時(shí)的一位女同學(xué)保持著友誼。

That was 40 years ago, but of course you wouldn't remember it. 那是40年以前的事，你自然想不起來(lái)了。

adj.出海的；用于航海的；從事航海的