他在只有4岁的时候开始谱写曲子的翻译：In only 4 years old when he began composing music 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

He started only four years old and write a song

In only 4 years old when he began composing music

He at only then 4 year-old time starts to compose the song

In only 4 years old when he began composing a song

In only 4 years old when he began composing music