He called me out of the blue after years of no contact.

他在多年没有联系后突然给我打电话。

The news about the company's bankruptcy came out of the blue.

公司破产的消息出乎意料。

She decided to move to another country out of the blue.

她突然决定搬到另一个国家。

I ran into my old friend at the mall, and it was completely out of the blue.

我在商场偶遇我的老朋友，这真是太意外了。

The sudden change in weather caught everyone out of the blue.

天气的突变让所有人都感到意外。