Audible signal
[电] 可闻信号
🧩 词语组成解析
signal
['sɪgnl]
n. 信号，暗号;预兆，征象;动机;导火线;
vt. 向…发信号;用动作（手势）示意;以信号告知;
vi. 发信号;
adj. 显著的，优越的;暗号的，作信号用的;
sign记号，信号+al表名词 → 信号
🗣️ 情景例句
The bank canceled his loan and took back his car.
银行取消了他的贷款并收回了他的车。
Is that a book?
那是一本书吗？
Could I have this sample free of charge?
这样品可以免费送我吗？