开区间 kāi qū jiān

open interval (in calculus)

Word data

HSK Not in HSK
Frequency Unknown

Definitions

  1. 1. open interval (in calculus)

Characters

Character Meaning
开 kāi HSK 1
to open; to turn on; to start
区 qū HSK 4
area; district; region
间 jiān HSK 2
between; among; within a definite time or space