（因为我最好的朋友在这一天生日）
Because my best friend's birthday is on this day.
（因为我最好的朋友在这一天生日）
Because my best friend's birthday is on this day.
for my best friend‘s birthday is on the day
beacuse it is today that my best friend birthday is.
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024