莫扎特开始写音乐当他四岁时的翻译：Mozart started writing music when he was four 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

Mozart began to write music when he was four years old

Mozart started writing music when he was four years old,

Mozart starts writes music to work as when his four years old

Mozart began writing music when he was 4 years old

Mozart started writing music when he was four years old,