Metastatic tumors to gingival from non - oral malignancies are very uncommon.摘要从 非 口腔部位的恶性肿瘤转移至齿龈是非常罕见.Objective To study the distribution of the chromatic value of gingival porcelains.目的了解临床常用牙龈瓷的颜色参数.Gingival margins c...
他们看见15名警察骑着摩托车排成V字形前行。They saw a squadron of fifteen motorcycle policemen driving in V-formation.他们打着象征胜利的V字形手势。They were waving V-signs for victory.道路呈U字形蜿蜒曲折。The roads twist round hairpin bends....