方向和加速表传感器都提供三个数据值。

The orientation and accelerometer sensors each provide three data values.

youdao

我所做的就是把F投影到切向量方向上，得出F沿着曲线的值,然后再把这些加起来。

What I do at any point is project F to the tangent direction, I figure out how much F is going along my curve and then I sum these things together.

youdao

物体运动，并向上加速度，因为摩擦力方向斜上，值为这个。

It is moving, so sure, it's going to be accelerated so the frictional force is in this direction, has this value.

youdao

Try it again. So, sure enough, changing the bias changed the price, and even changed it in the right direction.

我们再来运行一下，好了，很明显，这个偏向值改变了价格，而且方向也是对的。

麻省理工公开课 - 计算机科学及编程导论课程节选

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