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- The arch has a span of 60 metres. 那个拱的跨度为60米。
- The boy walks through the undecorated arch. 那男孩走过未经装饰的拱门。
- A convex surface, body, part, or line. 凸面、凸面体、凸面部分或凸线
- They considered him their arch opponent. 他们将他看成是主要对手。
- Marble Arch is a famous London landmark. 大理石拱门是著名的伦敦标志。
- Go through the arch and follow the path. 穿过拱门，沿著那条路走。
- Have you been to the Triumphal Arch? 你去过凯旋门吗？
- convex arch 内外三心拱
- The keystone in the crown of an arch. 拱顶石位于拱顶的塞缝石
- An arch over an entrance or passageway. 拱门，牌楼入口或通道上的拱顶
- The arch of short hairs covering this ridge. 眉毛覆盖于眉上的拱状短毛
- Just as a double convex lens enlarges, so a double concave lens reduces. 正象双凸透镜可以放大那样，双凹透镜也可以缩小。
- Light can be collected with the convex. 凸透镜具有聚集光线的作用。
- A pillar, rectangular in cross section, supporting an arch or roof. 支柱交叉处的长方形柱子，支撑一个拱顶或屋顶
- The convex surfaces faces toward the left. 凸面朝左方。
- The trees overhung the brook forming an arch of branches. 那些树伸向小溪上，形成一道树枝的拱门。
- A convex lens is used to concentrate rays of light. 凸透镜用于聚集光线。
- A stone tool with a convex side. 龟甲形石斧一边凸起的石制工具
- A deep - red garnet, unfaceted and convex. 红榴石一种深红色的石榴石，无刻面呈凸圆状
- Concave on one side and convex on the other. 一面凹进一面凸起的
