"Birthday" in Engpsh is pronounced as [bərθ-deɪ].
The word "birthday" comes from the Old Engpsh word "geburtdæg", which means "the day of one's birth".
Examples in Engpsh:
"Happy birthday!"
"I'm having a birthday party next week."
"Today is my best friend's birthday."
中文翻译：
"生日快乐！"
"下周我要举办生日派对。"
"今天是我最好的朋友的生日。"