或是
huòshì
or; either one or the other
In a story
可是镇上的高中生很少来图书馆,他们或是在学校上课,或是在家里写作业。But the town's high school students rarely came to the library. They were either in class or at home doing homework.书里的字条 · Notes in the Books · HSK 5
Grammar with 或是

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