"I told you Preskel had no idea," remarked Kemp with some asperity.“我告诉过你普雷斯克毫不知情的，”肯普颇为不耐烦地说道。He spoke to the boy with asperity.他严厉地对那男孩讲话.Thicker films assure fewer asperity contacts and less wear.油膜越厚,摩擦越少,并且磨损越小....
Won't i need a pacemaker or a permanent internal defibrillator?我不需要个心脏起博器或是内部的永久去纤颤器?She was fitted with a pacemaker after suffering serious heart trouble.她患上严重的心脏病后安装了心脏起搏器。Seen here is the explanted heart. Pacemak...
This preparation uses dialkyl imidazole salt, alkyl pyridine salt or caprolactam and fatty acid as reactant.该方法使用带有二烷基咪唑盐 、 烷基吡啶盐或者己内酰胺和脂肪酸作为反应物.Thus the term dialkyl carbonate includes, for example, methyl ethyl carbona...