all at once 突然；

例句：

All at once she lost her temper.

她突然大发脾气。

All at once there was someone knocking on the door.

突然有人敲门。

Mary thought of something all at once.

玛丽突然想到了一件事。

All at once he had realized something to the full.

突然，他完全明白了一件事。

The dollar lost strength the way many marriages break up—slowly, and then all at once.

美元的失势就像许多婚姻的破裂一样——慢慢地，然后突然垮掉。

She wanted to laugh and weep all at once.

她哭笑不得。

It's a lot of information to absorb all at once.

要一下子消化这么多资料，真是很难。

I can't do everything all at once—you'll have to be patient.

我不能万事一把抓呀。你可急不得。