发现别人脸色不好时，可以问：
What happened?
发生什么事了？
What's the matter?
有什么事情吗？
What's wrong?
有什么问题吗？
From scratch
从头开始

同义词：from the beginning, from nothing, from the start

电脑出问题了，怎么说：

My computer crashed.
我的电脑死机了。
The screen is frozen.
画面不动了。
I can't get it to work.
电脑出故障了。
My computer is out of order.
我的电脑出故障了。
Now, you've got about 5 megabytes of space left.
你只剩下5MB的空间了。
The computer is down.
电脑死机了。
The computer needs to be fixed.
电脑需要维修了。
The computer system has broke down.
电脑系统出问题了。
The printer doesn't work.
打印机出问题了。