前面可以加冠词the,也可以不加,例如:

1、She spoke in a slow southern drawl.她带着南方的拖腔慢条斯理地讲话。

2、It is a traditional kind of music from the southern states of America.这是一种来自美国南方的传统音乐。

3、The southern part of the country was slow to industrialize.这个国家的南部工业化进程缓慢。