The joggers paused to catch their breath.慢跑者们暂停下来以便喘口气.The only physical risk I ran was being bowled over by one of the many joggers.我的身体面临的唯一风险就是可能被众多慢跑者中的某一位撞倒。Mary : > Why do they want to keep joggers from using this ...
这共晶成分的熔化温度低于操作温度.This eutectic composition has a melting temperature lower than the operating temperature.对共晶硅形态的变化机理也作了初步探讨.The mechanism of this change also was researched preliminarily.本文设计了 Nb -Si基共晶自生复合材料的成分体系,并采用真空...