convex
/ˈkɑn.vɛks/ 名词 C2中文： 凸面、凸体
- Any convex body or surface.
- A playing card made convex for use in cheating.
- A small convex mirror used to cheat by observing other players' cards.
复数 convexes
来自图书馆
Then with an expression of interest he laid down his cigarette, and carrying the cane to the window, he looked over it again with a convex lens.
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