Fall back
公共 Public后退, 退卻\\n[計] 回落
?? 牛津釋義
fall back
move or turn back; retreat 後退; 撤退; 退卻
The enemy fell back as our troops advanced. 我軍前進, 敵軍後退. fall back on sb/sth (be able to) go to sb for support or use sth when in difficulty 有困難時（能）求助於某人, 依靠某事物
At least we can fall back on candles if the electricity fails. 停電時我們至少可以使用蠟燭.
She's completely homeless at least I have my parents to fall back on. 她是真正無家可歸--我至少有父母可依靠.
?? 詞語組成解析
fall
[f?l]
v. 落下;跌倒;減少;淪陷;
n. 落下;瀑布;秋天;減少;
back
[b?k]
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背書于;下賭注于;
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
How come you speak such good English?
你為什么能說這么好的英語呢？
How long did the movie last?
電影放了多久了？
No, it's not him.
不對，也不是他。