That was one reason why volatility was so low last year.这也是去年波动性如此低的原因之一.Volatility is an intrinsic characteristic of the security market.波动性是证券市场的一项内在特征.The Chicago Board Options Exchange Volatility Index sank 6.6 %.芝加哥...
钇被用作稀土金属一种理想的 非磁性 稀释剂.Yttrium serves as an ideal non - magnetic diluent for the rare - earth metals.采用注浆法制备了钇稳定化氧化锆 ( YSZ ) 电解质.The yttria stabilized zirconia ( YSZ ) electrolyte is fabricated by plaster casting method.研...