"反而" 的英文翻译是 "on the contrary"。这个词来源于拉丁语 "contrarius"，意思是相反的。

例句：

On the contrary, I think it's a great idea. (反而，我认为这是个好主意。)

On the contrary, she was actually very friendly. (反而，她实际上非常友好。)

On the contrary, I think he's made some very good points. (反而，我认为他提出了一些非常好的观点。)