Even window systems like X that were designed for use over networks have this problem — X still assumes that an application once started stays put.

即使像X窗口这种被设计用于在网络的系统存在这个问题——X仍假定应用程序一旦开始，并保持在那里。

youdao

Problem 2B is asking you to find the point at which h equals 2200, x=0 partial h over partial x equals zero 0 and partial h over partial y is less than zero.

题2B要求找到一点，在这点处，h等于，且∂h/∂,以及∂h/∂y小于。

youdao

Mathematically complete problem is that you can find the function x of t by saying that the second derivative of the function is equal to -k over m times the function.

这个数学问题就是,你可以求出函数 x,只要令函数的二阶导数,等于 -k 除以 m 再乘以函数

耶鲁公开课 - 基础物理课程节选

We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.

我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小

耶鲁公开课 - 基础物理课程节选

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