bday是什么缩写

　　例句：

　　1、We must not forget your birthday.

　　我们一定不能忘了你的生日。

　　2、I bought a birthday present for my mother

　　我给母亲买了一份生日礼物。

　　3、John just told me that your birthday is on the same day as mine.

　　约翰刚告诉我你和我的生日是同一天。

　　4、I took some photos with her camera on my birthday.

　　我用她的相机在我过生日那天拍了些照片。