Definition
Used to emphasize a statement, or to indicate that it is contrary to or different from what was previously mentioned.
其實
I thought this restaurant would be expensive, but as a matter of fact, its prices are quite reasonable.
我以為這家餐廳會很貴，但實際上，它的價格相當合理。
He looks tired, but as a matter of fact, he slept very well last night.
他看起來很累，但實際上，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.
他們最初以為這個項目會失敗，但實際上，它非常成功。