... (舍)九验法;九余法 casting-out-9 check=casting out nines 回光(线) catacaustic 剧变 catastrophe ...
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ADJ (of a caustic curve or surface) formed by reflected light rays (焦散曲面或表面)回光线形成的 → compare diacaustic
N a catacaustic curve or surface 回光曲面; 回光表面
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