Answer-back unit
[计] 应答装置
🧩 词语组成解析
answer
['ænsɚ]
vt.& vi. 答复; 解答; 答辩;适应;
n. 回答;答案;反应;足以媲美的人;
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;
unit
['ju:nit]
n. 单位，单元;装置;个体;[数]单位数;
🗣️ 情景例句
Before a long trip I always give my car a safety check.
远行之前，我总是会对车子进行安全检查。
How long has it been since you've heard from your uncle?
自从你听到叔叔的消息有多长时间了？
We realized that they must have become unduly frightened by the rising flood,
我们意识到他们一定是被不断上涨的洪水吓坏了。