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
He treats everyone with courtesy.
他对待每一个人都很有礼貌。
He has forgotten about his job.
他把工作忘得一干二净。
A parliamentary committee representing all political parties appoints a person who is suitably qualified to investigate private grievances against the State.