during the snapping of the fingers—in a flash;in an instant; in the twinkling of an eye ❍ ～就能达成协议，你还犹豫什么呢？ An agreement can be reached in an instant. Why are you still hesitating?
弹指之间tan zhi zhi jian
in a flash
弹指之间tán zhǐ zhī jiān
指非常短的时间。in an instant, in a flash, in a short moment