The book opened a window to new worlds.
Meaning: The book allowed the reader to learn about new places and things.
Choice of Words: Book is a set of written or printed pages that are bound together. Opened means to make or become open. Window is an opening in a wall, door, or vehicle that allows light and air to enter. New means not existing before. Worlds are the Earth and its inhabitants, or a particular region or sphere of activity. This sentence uses metaphorical language to describe how reading a book can transport the reader to different places and experiences.
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