关于expectoration的百科

• expectoration造句怎么写

• PracticeoneffectivelyexpectorationafterpneumonectomyRespirationsystem:nocough,expectoration,hemoptysis,aspirationdifficultyhistory.InfluenceofvibratingsputumevacuationdeviceonexpectorationofpatientsundergoingmechanicalventilationComparativestudyforth...
• 2017-01-2611421