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
May I have a word with you?
能和你说句话吗?
I ought to keep cool.
我应该保持冷静。
Neither was I surprise when the train stopped at Widley, a tiny station a few miles along the line.Even a mighty express train can be held up by signals.