Backward busying signal
[计] 回程占线信号
🧩 词语组成解析
v. 忙着做某事( busy的现在分词 )
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
When he came to the States five years ago, he had only forty dollars in his pocket.
五年前他来美国时，口袋里只有40美元。
What will you wear for the party?
晚会上你穿什么？
If you jump the queue ,other people will not be pleased!
如果你夹塞儿，别人就会不高兴！