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。
A convex surface, body, part, or line.
凸面、凸面体、凸面部分或凸线
This is a convex mirror.
这是面凸面镜。
convex详细解释
con.vex adj.(形容词)Having a surface or boundary that curves or bulges outward, as the exterior of a sphere.凸起的:具有向外弯曲或凸出的表面或边界的,如球体的外表面 来源:Latin convexus * see wegh- 拉丁语 convexus *参见 wegh- 【引伸】 con.vex.ly adv.(副词)