| 单词 | pyrrolidone | 
| 释义 | pyrrolidonenoun  pyr·rol·idone   -dōn    plural -s     : a crystalline or liquid lactam C4H7NO made by a series of steps using acetylene, formaldehyde, and ammonia and used chiefly in making polyvinylpyrrolidone; 2-pyrrolidin-one  called also 2-pyrrolidone | 
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