So even though we see a nodal plane down the center, I just want to really point out that it's only when we have a nodal plane in the internuclear or the bond axis that we're calling that a pi orbital.

虽然在中间有个节面，我想要指出的是,只有节面在核间轴,或者键轴上时,我们才叫它π轨道。

麻省理工公开课 - 化学原理课程节选

So instead, these would be canceling out wave functions between the two, so we would end up with a nodal plane down the center.

相反，两者之间的,波函数会相互抵消，所以我们在中间会得到一个节面。

麻省理工公开课 - 化学原理课程节选

You go on an airplane and then after the usual delays, the plane begins to accelerate down the runway.

你坐上飞机,正常晚点之后,飞机就开始沿着跑道加速

耶鲁公开课 - 基础物理课程节选

Suppose I've got a heat-seeking missile which tracks down the plane.

假设有一个热追踪导弹,正在追踪一架飞机

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That means, if you are going in a plane and you throw something up in the air, it seems to be going up and down to you.

也就是说,如果你在飞机中,你向空中扔出一物体,它也许会相对于你上下运动

耶鲁公开课 - 基础物理课程节选