1. That's OK! 没关系! 2. That's alright!没关系! 3. Don't worry about it!不用担心! 4. It's nothing!没什麼! 5. Never mind!别放在心上! 6. It doesn't matter!无所谓! 7. It doesn't make any difference!没差! 8. No problem!没问题! 9. Fine with me. / Fine by me.我没问题. 10. Cool!酷!（没事儿!）
