“对不起我错过了你的生日。”“算了，没关系。”

"I'm sorry I missed your birthday." "___Forget ___it, it doesn't matter."

老师最后告诉我：“算了，没关系，”我感到很愚蠢。

The teacher finally told me: "___Forget ___it, it doesn't matter," and I felt so stupid.

别担心那个错误。算了，没什么大不了的。

Don't worry about the mistake. ___Forget ___it, it's not a big deal.