函数参数 pin: 蜂鸣器所用端口 frequency: 发音的音调 duration
生日歌
外国名曲简谱祝你生日快乐美国
《祝你生日快乐》的英文歌词
英文生日歌-百度百科
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
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