before you could say Jack Robinson短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 一下子 I can't say offhand how much money I earn.我一下子说不上来我挣多少钱。 He could not shake it immediately.他不能一下子摆脱掉。 You look not well,you'd better go to see a doctor.你脸色不太好，最好马上去看一下医生。 Right off the bat you should have put two and two together.你本应该马上作出合理推论的。