I'm thirteen.Nancy is eleven.(用two,young,than将两句合为一句）急啊!

I'm thirteen.Nancy is eleven.(用two,young,than将两句合为一句）急啊!
I'm thirteen.Nancy is eleven.(用two,young,than将两句合为一句）急啊!

I'm thirteen.Nancy is eleven.(用two,young,than将两句合为一句）急啊!
I'm thrieteen,Nancy is two years younger than me.

I'm thirteen while Nancy is eleven,which means she is two years younger than me.