The formal definition is that the gravitational potential energy at a point P is the work that I, Walter Lewin, have to do to bring that mass from infinity to that point P.
形式定义就是,它在点P的重力势能,等于我，将物体从无穷远处,移动至点P所做的功。
It is this that allows us to do the trick of printing out the parameter "p" and then passing it to the "rest" function to continue the computation, seen here in the definition of the "Bind" method.
这样话，就可以让我们能取巧打印出参数“p”并接着把它传递给“rest”函数继续进行计算。
This paper gives the definition of P-hereditary ring and discusses the necessary and sufficient condition about the submodule closure of cyclic module.
本文给出p—遗传环的定义及循环模的子模闭的充要条件。
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