英文释义

adv. From a definite past time until now; as, he went a month

ago, and I have not seen him since.

adv. In the time past, counting backward from the present;

before this or now; ago.

adv. When or that.

prep. From the time of; in or during the time subsequent to;

subsequently to; after; -- usually with a past event or time for the

object.

conj. Seeing that; because; considering; -- formerly followed

by that.