The latter two are simply the "inverse" of the first two, the only difference being whether the end point in question is on the receiving or sending end of the initial message.

后两种与前两种是简单“对立”关系，唯一的区别在于有问题的端点是在初始消息的接收端还是发送端。

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Euler equations of generalized Riemann variable are derived from unsteady primitive variable Euler equations and solved by using two - a point-two-step upwind finite difference method.

该方法将原参数非定常欧拉方程组重新组合成以广义黎曼变量表示的欧拉方程组，再用二点二步迎风格式离散求解。

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Two methods of determining ignition advance Angle are proposed according to different reference point, and the reason for this difference of the two methods are analyzed.

按参考点的不同，提出了两种确定点火提前角的方法，并分析了两种方法产生差别的原因。

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"Only a one- or two-percentage-point difference, but over billions of dollars, that's a lot of money, " says Robert Wayman, HP's current chief financial officer.

FORBES: Cover Story

Kevin Sinfield kicked all four conversions, as well as a penalty, the reliable skipper's 10-point haul ultimately proving the difference between the two teams.

BBC: Leeds Rhinos 26-16 Warrington Wolves