我努力过了，我就不后悔，我可以大声告诉全世界的人，我是胜利者。

I'll never feel regret as I've tried my best. So, I could tell the people in the world loudly and proudly: I'm the victor!

I'll never regret after I try my best, and I can tell everyone in the world, I am the winner.

I tried my best so I wouldn't regret. I can speak to the whole wold loudly that I am already the winner.

I gave my best shot; I'm not gotta regret;I could yell out to the whole world: I'm a winner!