莫扎特在他4岁的时候就开始写音乐了。的翻译：Mozart when he was 4 years old he began writing 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

Mozart in his 4 years old when he began to write music.

Mozart when he was 4 years old he began writing music.

Mozart at he 4 year-old time started to write music.

Mozart in his 4 -year-old to start writing music.

Mozart when he was 4 years old he began writing music.