on call片語KK [ɑn kɔl] /ɑn kɔl/發音片語1待命、隨叫隨到She is on call every other weekend at the hospital.她每隔一個週末都要在醫院待命。2隨時可支取、通知即付金融The bank keeps part of the funds on call for emergencies.銀行把部分資金設為隨時可支取，以應急需。形容詞1待命的、隨叫隨到的The building has an on-call engineer available around the clock.這棟大樓有工程師全天候待命。