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not (EN)
副词,连词

副词 “not”

not (more/most)
  1. (跟在动词后面,用来表示否定)
    She is not going to the party tonight.

连词 “not”

not
  1. 不是(用来表达与另一个陈述的对比)
    He prefers tea, not coffee, in the morning.