before you can say Jack Robinson idiom old-fashioned informal
转瞬间，一眨眼
used to say that something happens very quickly
Before you could say Jack Robinson, she'd jumped into the car and driven away. 一眨眼的功夫，她已经跳上汽车开走了。
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。