ex·pur·gate /ˈɛkspɚ/
  (vt.)刪除,修訂,使純潔
  Ex·pur·gate v. t. [imp. & p. p. Expurgated p. pr. & vb. n. Expurgating ]  To purify; to clear from anything noxious, offensive, or erroneous; to cleanse; to purge; as, to expurgate a book.
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  expurgate
       v : edit by omitting or modifying parts considered indelicate;
           "bowdlerize a novel" [syn: bowdlerize, bowdlerise, castrate,
            shorten]