south southern 南方的adj 有什么区别?

south southern 南方的adj 有什么区别? south,southern的区别 south 和southern 的区别 south和southern的区别 英文中的“south”作形容词南方的时与“southern”的区别. south和southern的用法与区别 south southern southest的区别与用法 south和southern之间的区别是什么? South China 和southern China有什么区别?我一直没搞清楚 in the southern part of 和in the south part of 有什么区别? Southern Blot和Southern blotting和Southern杂交和Southern免疫印迹有什么区别 South Africa和Southern Africa区别?