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
I've got no idea.
我不知道。
I think I'll try out for the Drama Club.
我想在戏剧俱乐部试试看。
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.