Justin Bieber müzik kariyerine başladığında on dört yaşındaydı.
- When Justin Bieber started his music career, he was fourteen years old.
On yaşındayken gitar çalmayı öğrendim.
- I learned to play guitar when I was ten years old.
... Isaac Newton do? When he was 23 years old, not only did he stumble upon the force of ...
... when i was eight years old ...