Answer-back signal
[計] 應答信號
?? 詞語組成解析
answer
['?ns?]
vt.& vi. 答復; 解答; 答辯;適應;
n. 回答;答案;反應;足以媲美的人;
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;
signal
['s?gnl]
n. 信號，暗號;預兆，征象;動機;導火線;
vt. 向…發(fā)信號;用動作（手勢）示意;以信號告知;
vi. 發(fā)信號;
adj. 顯著的，優(yōu)越的;暗號的，作信號用的;
sign記號，信號+al表名詞 → 信號
??? 情景例句
There's a lot in what you say, but we have more urgent problems to deal with.
你說的相當有道理，不過我們有更緊要的事情要辦。
Help yourself.
請便！
When you rescued your trousers, did note in your back pocket? When you rescued your trousers, did you find the note was whiter than white?
當你把褲子搶救出來時，你有沒有發(fā)現(xiàn)那張紙幣已經(jīng)變得比白紙還白？