生日快乐英文字母怎么写

1、生日快乐:Happy birthday 。
【生日快乐英文字母怎么写】2、[例句](1)蛋糕上裱了“生日快乐”的字样 。The cake had Happy Birthday piped on it.
 ?。?)生日快乐 , 亲爱的 。Happy birthday, sweetheart.