Definition
Used to emphasize a statement, or to indicate that it is contrary to or different from what was previously mentioned.
其实
I thought this restaurant would be expensive, but as a matter of fact, its prices are quite reasonable.
我以为这家餐厅会很贵，但实际上，它的价格相当合理。
He looks tired, but as a matter of fact, he slept very well last night.
他看起来很累，但实际上，他昨晚睡得非常好。
They initially thought the project would fail, but as a matter of fact, it was very successful.
他们最初以为这个项目会失败，但实际上，它非常成功。