during the snapping of the fingers—in a flash;in an instant; in the twinkling of an eye ? ～就能達成協(xié)議，你還猶豫什么呢？ An agreement can be reached in an instant. Why are you still hesitating?
彈指之間tan zhi zhi jian
in a flash
彈指之間tán zhǐ zhī jiān
指非常短的時間。in an instant, in a flash, in a short moment