n. 信號(hào),暗號(hào);預(yù)兆,征象;動(dòng)機(jī);導(dǎo)火線;
vt. 向…發(fā)信號(hào);用動(dòng)作(手勢(shì))示意;以信號(hào)告知;
vi. 發(fā)信號(hào);
adj. 顯著的,優(yōu)越的;暗號(hào)的,作信號(hào)用的;
sign記號(hào),信號(hào)+al表名詞 → 信號(hào)
??? 情景例句
Right now, we should clean up this room.
現(xiàn)在, 我們應(yīng)當(dāng)清理一下房間。
If anyone here does one of these things, let me know.