It is true.
可以说成 What I have said are all facts.
这是事实 网络释义 这是事实:That's a fact Ta就将它治好，这是事实。:He'll fiChu it and that's the truth Ta受到了热情接待，这是事实。:he was received with great affection, it is true
That's the truth you can't deny.
an undoubted fact