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
and I'm running for the open seat on the school board.
我正在竞选联合校董会的席次。
This kind of box is not suitable for the transport of the tea sets by sea.
这种箱子不适合装茶具海运。
People who work in offices are frequently referred to as white-collar workers' for the simple reason that they usually wear a collar and tie to go to work.