突然：表示某事情发生得非常快，几乎在转眼之间。
转眼间, 突然 before you can say knife adv. 突然 before you could say Jack Robinson [口]一下子, 一眨眼工夫, 马上 .
说时迟，那时快 quicker than words can tell; in a twinkling; before you can say knife; before ... 说时迟那时快 in the twinkling of an eyein an instant 时迟系统 time lag system .