Optical signal
[计] 光信号
🧩 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
I hope you're all enjoying the exhibition.
我希望你们都喜欢这个展览
There is much to be said on both sides.
公说公有理，婆说婆有理。
The coldest season of the year is winter.
一年里最冷的季节是冬天。