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'll make new friends wherever we are as long as we're together.
只要我们能在一起， 无论在哪儿我都能交到新朋友。
You look very serious about something.
你似乎有很严重的事。
but on the Indian Ocean, the Cutty Sark took lead.
但在印度洋上，“卡萨萨克”号驶到了前面。