Emergency signal
[计] 紧急信号
🧩 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
He looked up at me.
他仰头看我。
Sometimes Henry peeps into his sister's diary.
亨利有时候会偷看他姐姐的日记。
It has helped me to serve others.
这份礼物帮助我为他人服务。