Staircase signal
[电] 梯形讯号
🧩 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
At four o'clock,
四点钟，
How much do you want to change?
您想兑换多少？
Oh, we have beautiful sunshine everyday! It's very warm. Sometimes it's too hot.
噢，每天阳光明媚！很暖和。有时太热。