作弊用凸面牌；作弊用的小凸面镜；任何凸体或凸面。；为作弊而制成凸形的扑克牌。；用于偷看其他玩家牌的小凸面镜。
A convex body or surface.
任何凸体或凸面。
Any convex body or surface.
为作弊而制成凸形的扑克牌。
A playing card made convex for use in cheating.
用于偷看其他玩家牌的小凸面镜。
A small convex mirror used to cheat by observing other players' cards.
The convex of the lens refracts light to a focal point.
透镜的凸面将光线折射到焦点。
用法提示：凸面：名词，指透镜的凸出表面。
In geometry, a convex is a surface that curves outward.
在几何学中，凸面是指向外弯曲的表面。
用法提示：凸面：名词，几何中的外凸曲面。
The convex on the back of the spoon can be used as a mirror.
勺子背面的凸面可以用作镜子。
用法提示：凸面：名词，勺子背面的凸起部分。
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