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
Are they always that difficult to make?
领结这样难打吗？
Take something by the best handle.
理解某事物，乘其好机会。
All the cattle had been moved into stalls and we stood to lose little.
所有的牲口已提前转移到畜圈里，没有造成什么损失。