dialect area的用法和样例：
例句
- In order to solve the problem of communication between people from different dialects areas, we study mandarin.
为了解决来自不同方言区的人们之间的交流问题，我们学习普通话。 - Native dialect is the largest obstacle of Putonghua study for the students in the dialectal areas.
母语方言是方言区学生学习普通话的最大障碍。
