at a moment rs notice 基本例句 立即; 马上; 即刻 He broke a rib when he fell off his horse.他从马上摔下来折断了一根肋骨。 You want to see a doctor at once.你必须马上去看医生。 Death is instantaneous in a fatal accident.在致命的事故中,死亡是即刻发生的。 The letter inclined her to set off at once.那封信使她想即刻动身。