Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/7a1c41c6bc2164ff0c8049ca0898abbd.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 boolean symbol例句_boolean symbol英汉例句_boolean symbol双解例句_流逝汉英词典
This paper demonstrates that cartographic symbol system belongs to Boolean algebraic one according to Boolean algebraic definitions and sufficient conditions. 根据布尔代数的定义和充要条件，结合地图符号示冽，论证了地图符号系统是布尔代数系；