英语翻译原段：The Irish countryside is very beautiful.There is a po

英语翻译
原段：
The Irish countryside is very beautiful.There is a popular Irish song which says that there are 100 different shades of green in the Irish landscape,and this is no exaggeration.Thanks to generous rainfall,much of the countryside is covered in rich green vegetation,which is why Ireland is also known as the Emerald isle.It also has a varied landscape with dramatic mountains,rocky coastlines and rolling hills.
这段话是否有语法错误?
以及最后一句中dramatic mountains,rolling hills如何恰当地翻译?