trilogy
US /ˈtrɪl.ə.dʒi/
UK /ˈtrɪl.ə.dʒi/
1.
三部曲
a group of three novels, films, or plays that are complete in themselves but are related to each other in subject matter, or by a common author or characters
:
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The Lord of the Rings is a famous trilogy.
《指环王》是一部著名的三部曲。
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She plans to write a trilogy of historical novels.
她计划写一部历史小说三部曲。