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
Did you make any long distance calls this morning, or did you sign for your breakfast?
您今天早上没有打长途电话或吃早餐记账？
The computer is going to kill me.
我快要被电脑逼死了。
If they had only had one more child, the fact would have passed unnoticed.
如果他们只添了1个孩子，这件事本来就不会引起任何人的注意。