这本书主要讲的是英语学习中的难点。
This book mainly deals with difficult points in the study of English.
故事主要讲的是多萝西的冒险经历，她可谓是最难饰演的角色。
The story focuses on Dorothy’s adventure, and she is the most difficult to cast.
故事主要讲的是多萝西的冒险经历，她可谓是最难饰演的角色。
The story focuses on Dorothy’s adventure, and she is the most difficult to cast.
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