happybirthday翻译成中文是祝你生日快乐。
例句：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。
Happy birthday， sweetheart. 生日快乐，亲爱的。
Please join me in wishing him happy birthday!
让我们一起祝他生日快乐吧！
She said thank you and wished her friend happy birthday.
她只是说谢谢，并祝她的朋友生日快乐。
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