许多动物物种现已从地球上绝迹.Many types of animal have now vanished from the earth.那种传染病早已绝迹.That kind of epidemic disease has long been stamped out.甚至在今天这种做法还未绝迹.Even today remnants of this practice remain....
事态呈现出可喜的前景.This state of things holds out a cheerful prospect.我们有一项可喜的数据.We have a fascinating statistics.可喜的胜利消息不断传来.Heartening reports of victories are pouring in....
Methods: GI - II infiltrated ceramic and In - ceram disks were fabricated and polished.方法: 制备GI - 型渗透陶瓷和In-ceram圆盘形试件,研磨抛光.Objective : To study the influence of different thickness to In - Ceram restoration.目的: 研究不同厚度In ...