proper subset

名词 n.
中文释义

英文释义

名词 n.
  1. a set that is a subset of the set, but not equal to it.
    — {2, 4, 5} is a proper subset of {1, 2, 3, 4, 5}, but {1, 2, 3, 4, 5} is not.

词形变化

proper subsets plural
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