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单词	anhydrous
释义	anhydrous /anˈhʌɪdrəs / adjective Chemistry (Of a substance, especially a crystalline compound) containing no water.The sample was maintained at room temperature for 24 h to ensure conversion of any anhydrous cholesterol crystals to the monohydrate form.... The plants produced urea ammonium nitrate and anhydrous ammonia. The water in the mantle may be contained either in high pressure hydrous phases, or alternatively as small hydrous defects in nominally anhydrous minerals. Origin Early 19th century: from Greek anudros (from an- 'without' + hudōr 'water') + -ous.
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