用英文怎么表达？生日快乐
双语例句：
祝您生日快乐！
Happy birthday to you!
他在蛋糕上镶上了“生日快乐”的字样。
He piped "happy birthday" on the cake.
The whole class all joined together to sing happy birthday to the teacher.
全年生日快乐！
Happy Birthday All Year!
你知道"祝你生日快乐"这首歌是第一首在外太空被唱响的歌吗？
Do you know that the "Happy Birthday to You" song is the first song sung in outer space?
