Radio signal
[电] 无线电讯号
🧩 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
What's that?
什么问题？
Charity begins at home, but should not end there.
仁爱须由近及远。
We are prohibited from smoking on school grounds.
我们被禁止在校园内抽烟。