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 would like to make an appointment for a hairdo, please.
我想预约理发, 劳驾。
To hover
盘旋
I think it would be a good idea to have comments from secretaries and typists who are already using it. Then they can express their satisfaction with the product.