∵ since; because 因为
∴ hence 所以
∷ equals, as (proportion) 等于,成比例
⊥ perpendicular to 垂直于
http://blog.youkuaiyun.com/iltaek/archive/2008/12/16/3521628.aspx
∵ since; because 因为
∴ hence 所以
∷ equals, as (proportion) 等于,成比例
⊥ perpendicular to 垂直于
http://blog.youkuaiyun.com/iltaek/archive/2008/12/16/3521628.aspx

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