实际上这是两个句子的合并，展开来就是： A student of music needs as long and as arduous a training to become a performer as a medical student needs to become a doctor。
A student of music needs as long a training to become a performer as a medical student needs to become a doctor and needs as arduous a training to become a performer as a medical student needs to become a doctor。
这样展开来之后就可以清清楚楚地明白这句话的意思了。 翻译过来之后就是： 学音乐的学生要想成为一个表演艺术家就要像学医学的学生要想成为一个医生一样，同样需要一个漫长的费力的训练过程。
