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闭区间
閉區間
bìqūjiān
1. closed interval (in calculus)

Character Breakdown

闭
bì
to shut, to close; to obstruct, to block
HSK 5 6 丶
区
qū
area, district, region, ward; surname
HSK 4 4 丶
间
jiān
between, among; midpoint; space, place, locality
HSK 2 7 丶

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Category
Chinese