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
Well, Robbie was eight pounds two ounces,
嗯 ，Robbie生下来八磅二盎司，
You're dreaming.
你做梦！
At night, the children always do their homework.Then they go to bed.
晚上，孩子们总是做作业，然后去睡觉。