Mozart was born in Salzburg in 1756 and started writing music when he was 5 years old. If this new research is correct, these advanced works were composed by a 3- or 4-year-old!是什么意思_Mozart was born in Salzburg in 1756 and started writing music when he was 5 years old. If this new research is correct, these advanced works were composed by a 3- or 4-year-old!在线翻译_英语_读音_用法_例句