Shall we never say goodbye? Good bye, and for the next time, okay?

我们永远不说再见好吗？再见，也是为了下一次见，好吗？

youdao

Also, every time he after failure often say mantra is: "I'll be back again next time revenge" and "I will not pass you" never say die like the word.

而且，他每次失败后经常说的口头禅就是：“我一定会回来报仇的”“我下次一定不会放过你们的”之类从不言败的话。

youdao

Many say that Petersen was never the same and in his next outing he lost for the first time, Len Harvey winning a controversial points decision to claim the British title.

BBC: 9. Jack Petersen