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 sure am.
我确实饿了。
What is happening up there?
上面发生什么事情?
He passed his exams, and even better, when he left university he had earned enough money to start his own business, offering guide services to tourists.