Visual signal
[电] 视觉讯号
🧩 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
Feel free to look around.
请随意到处看看。
It's hard sailing when there is no wind.
没有风难航行。
Though the costume consisted only of a sheet, it was very effective.
尽管化装服仅由一个被单制成，却十分逼真。