"To be in a state of surprise" is a common way to describe being surprised in Engpsh. This phrase comes from the noun "surprise," which means a feepng of sudden and unexpected amazement or wonder.

Here are some examples of sentences using this phrase:

"I was in a state of surprise when I found out I had won the lottery." (我当时就处于惊讶之中，因为我发现我中了彩票。)
"She was in a state of surprise when she saw the giant balloon floating in the sky." (当她看到天空中漂浮的巨型气球时，她处于惊讶之中。)
"He was in a state of surprise when his boss offered him a promotion." (当他的老板给他提供升职的机会时，他处于惊讶之中。)

You can also use the adjective "surprised" to describe someone who is feepng surprised:

"She looked surprised when I told her the news." (当我告诉她这个消息时，她看起来很惊讶。)
"He sounded surprised when I called him on the phone." (当我打电话给他时，他听起来很惊讶。)
"They seemed surprised when we arrived early to the party." (当我们早到聚会时，他们似乎很惊讶。)