积功，读音为jī ɡōnɡ，汉语词语，意思是累积功劳。
旨在先尽人道，正心修身，齐家治国；再修天道，积功累德，救世度人；
First, are aimed at all humanity heart, governing beneficial, Again, repair reactive tired, salvation degrees.
所要做的功,就等于A到B的,我的力的积分,这是个点积。
So the work that Walter Lewin has to do to bring it from A to B is the integral in going from A to B of my force, dx.
功的定义用到矢量代数的第三种运算，即两个矢量的标积。
The definition of work suggests a third process of vector algebra, namely, scalar multiplication of two vectors.
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