该竞技场为四周封闭式结构,可以举行斗剑 、 格斗 、 斗兽及其他竞赛项目.The amphitheater was a sealed off round structure . Swordplay, wresting, gladiatoral and other contests were held there.最高楼层将以世界最高的 非 封闭式观察台为特色.The uppermost floors will feature the w...
In graphite sheets, carbon atoms bond together in rings.石墨层中的碳原子相互连接形成碳环。Made from cast iron, it is finished in graphite enamel.它是用铸铁制成，最后在外面搪了一层石墨。A powerful electric current is passed through a piece of graphite.给一块石墨通...
The division of Europe into warring blocs produces ever - increasing centrifugal stress.把欧洲分为作战集团产生了越来越大的离心效果.The custom traces to the time of the Warring States.这个风俗可上溯到战国时代.She would willingly forgo a birthday treat if...