happybirthday~。请翻译成中文，并怎么用英文给她回答？

happy birthday翻译成中文意思是生日快乐。英式音标：[?h?p?] [?b??θde?] ，美式音标：[?h?p?] [?b?θde]。

例句：

1.He was greeted with a rousing chorus of Happy Birthday.

迎接他的是大家齐唱《祝你生日快乐》，令他非常感动。

2.Happy Birthday!

生日快乐！

3.Happy birthday, sweetheart.

生日快乐，亲爱的。