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 do, too.
我也一样。
What beautiful trees those are!
那些是多么美丽的树呀!
She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.