And we're going to have q2 prime, and we're going to draw the arrows in the positive direction in these cases.

还有q2一撇，在这个例子中,我们把箭头朝正方向。

麻省理工公开课 - 热力学与动力学课程节选

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

They love their country but they also know that things are going very wrong in the world.

他们热爱自己的祖国,他们同时也知道,事情正朝着不好的方向发展。

普林斯顿公开课 - 国际座谈会课程节选

And now since it's reversible, we can run it forward or backward.

因为它是可逆的，所以可以正方向运行。

麻省理工公开课 - 热力学与动力学课程节选

So, what this means is that when we're looking at an actual wave function, we're treating it as a wave, right, so waves can have both magnitude, but they can also have a direction, so they can be either positive or negative.

这意味着,当我们看一个波函数时,我们把它看做一个波，波不仅有幅值，还有方向，所以它们可正可负，如果。

麻省理工公开课 - 化学原理课程节选

Then you guys know, you just told me, acceleration is -9.8, We call it "minus" because it's accelerating down and up was taken to be the positive direction.

然后你们都知道,你告诉我,加速度是-9.8,我们取负号是因为加速度方向朝下,而正方向为竖直向上

耶鲁公开课 - 基础物理课程节选

This equation is telling you if you compress it, namely if x is negative, F will be then positive, because it's pushing you outwards.

这个方程告诉我们,如果压缩弹簧,即令 x 为负,F 就为正,因为推力的方向向外

耶鲁公开课 - 基础物理课程节选

Unit vector i points away from the origin in the x direction.

单位矢量 i 从原点指向 x 轴正方向

耶鲁公开课 - 基础物理课程节选

But since it is a component it can have a direction, too, so can go up l between negative l and positive l.

但因为它是个分量,它是有方向的，所以它可以,从负的l一直到正的。

麻省理工公开课 - 化学原理课程节选

j points away from the origin in the y direction.

从原点指向 y 轴正方向

耶鲁公开课 - 基础物理课程节选

By the way, I didn't tell you this but I think you know that I picked my origin to be here and measured y positively to be upwards and I called that 15 meters.

顺便说一下,虽然我没明确指出,但我想你们应该都知道,我把原点取在这里,并规定y的正方向朝上,我设把这里的高度为15米

耶鲁公开课 - 基础物理课程节选