例句與造句

1. Abstract : positron spectroscopy is a new and sensitive microanalytical probe for characterization of polymer microstructures . we report recent advances in this area , including studies on the free volume properties , structural transition , miscibility of blending polymers , physical aging , doping of functional polymers , interfacial interaction of multiphase polymers , etc
   文摘:簡(jiǎn)要介紹了近年來(lái)正電子譜學(xué)在聚合物微結(jié)構(gòu)研究中的主要應(yīng)用及進(jìn)展.大量實(shí)驗(yàn)事實(shí)表明，正電子譜學(xué)是表征高聚物微結(jié)構(gòu)的極靈敏方法
2. It's difficult to find positron spectroscopy in a sentence. 用positron spectroscopy造句挺難的