n. 背,背部;背面,反面;后面,后部;(椅子等的)靠背;
vt. 使后退;支持;加背书于;下赌注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
🗣️ 情景例句
No, …is not in right now. May I take a message?
不, ……现在不在这儿。 我能帮你捎个口信吗?
I'm sorry I forgot your birthday, it completely slipped my mind.
我很抱歉忘了你的生日,我完全不记得了。
This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.