In the gymnasiums of Beijing and Shanghai, there were grounder competitions.上海 、 北京都有健身房里玩地滚球的比赛.His teams have always prospered in cup competitions.他的队伍在杯赛上总是成绩不俗。The council has organised a series of events and competi...
He picked off the burs that had stuck to his overcoat.他摘下粘在外衣上的刺果.Methods: The root canalroot canal orifice burs and helical drilling bits were prepared in advance.方法: 采用根管口台阶状车针与螺旋型根管钻组合起来扩大根管....