ob·stru·ent /ˈɑbstrəwənt/ 形容詞
  止瀉劑,阻塞的,梗阻的
  Ob·stru·ent a.  Causing obstruction; blocking up; hindering; as, an obstruent medicine.
  Ob·stru·ent, n. Anything that obstructs or closes a passage; esp., that which obstructs natural passages in the body; as, a medicine which acts as an obstruent.
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