This formula doesn't tell you which way it's pointing, because it's a scaler; it's not a vector equation.

这个式子没有说明方向,因为这是一个标量而非矢量方程

耶鲁公开课 - 基础物理课程节选

I hear this as me being in the center and this oxcart starting-- It could start at either side. It doesn't matter.

我听着这首曲子,感觉像我正站在路中央,然后牛车动了,牛车可以从任何方向开动,这没有关系

耶鲁公开课 - 聆听音乐课程节选

The quest is without end, it's even without direction.

这一追寻没有止境，甚至没有方向。

耶鲁公开课 - 现代诗歌课程节选

At infinity, there's no stored potential energy, and it drops off more and more negative as one over R.

在无限远处，没有储存的势能，并且它向负方向减少，当距离超过R时。

麻省理工公开课 - 固态化学导论课程节选

But keep in mind sigma orbitals have no nodal planes along the bond axis.

但记住sigma轨道沿着,键轴方向是没有节点的。

麻省理工公开课 - 化学原理课程节选

So there is no preferred direction.

没有特定的方向。

麻省理工公开课 - 固态化学导论课程节选

There is no preferred direction.

没有特定的方向。

麻省理工公开课 - 固态化学导论课程节选