达尔文告诉我们进化是没有方向的。

Charles Darwin taught us that evolution has no direction.

youdao

我站在一个没有方向的路口处，看着你开心的奔跑着。

I stood without a direction, at the junction of looking at you happy running.

youdao

好吧，先拿她的古怪不说，她还绝对是迷糊和没有方向的女人。

Well, well, well, she's eccentric to say the least and she's definitely confused and disoriented.

youdao

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

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

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