一个可以进行符号运算的工具,能支持用户自定义编程,进行求导,微分等运算-a symbolic computation can be a tool to support user-defined programming, derivative, differential, etc. Operational
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000959s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000799s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.005854s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 111362 [ RunTime:0.012980s ]
