sub·stit·u·ent /səbˈstɪʧəwənt, ˈstɪʧwənt/
取代
sub·stit·u·ent /səbˈstɪʧ(ə)wənt/ 名詞
取代物,取代基的,置換基的
Sub·stit·u·ent n. Chem. Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed.
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