1. Don't leave any regrets.
2. Don't have any regrets.
3. Don't have any regrets in life.
4. Live without regrets.
5. Make the most of every moment to avoid regrets.
6. Don't leave sorrow behind you.
7. Whatever you do, try to do it so that you won't have any regrets afterwards.
8. No regrets in whatever you do.
9. Never leave any regret when you do anything.
10. Hope we never leave a pity to ourselves.
11. Don't want us to live with any regrets.
12. We can never lose each other once again.
希望这些句子能帮助你表达“不要留下遗憾”的意思。