转眼间

before you can say Jack Robinson

in the twinkling of an eye

in a crack

时间过得真快，转眼间你就将中学毕业，并拟于秋季进入州立大学了！
How time flies! Here you are graduating from high school and planning to attend State University in the fall.

转眼间他就无影无踪了。
He disappeared in a twinkling of an eye.

她转眼间就把他父母找来了。
She fetched her parents in the twinkling of an eye.

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