Fall back
公共 Public后退, 退却\\n[计] 回落
📖 牛津释义
fall back
move or turn back; retreat 後退; 撤退; 退却
The enemy fell back as our troops advanced. 我军前进, 敌军後退. fall back on sb/sth (be able to) go to sb for support or use sth when in difficulty 有困难时（能）求助於某人, 依靠某事物
At least we can fall back on candles if the electricity fails. 停电时我们至少可以使用蜡烛.
She's completely homeless at least I have my parents to fall back on. 她是真正无家可归--我至少有父母可依靠.
🧩 词语组成解析
fall
[fɔl]
v. 落下;跌倒;减少;沦陷;
n. 落下;瀑布;秋天;减少;
back
[bæk]
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
Jack Wang? No, I don't think I know him.
杰克王？我想我不认识。
First come, first served.
先来先卖。
it would be up and down, to and for and from side to side.
呈现出上上下下、来来回回、左左右右3种性质的运动。