他是4岁的时候开始写音乐的的翻译：Started writing music when he was 4 years old 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 is 4 years old, began to write music

Started writing music when he was 4 years old

He is 4 year-old time starts to write music

He is a 4 -year-old started to write music for

Started writing music when he was 4 years old