If you give a sign, on top of the number, that takes care of all ambiguity in one dimension.
如果你在数字前加一个符号,就把一维运动的所有的歧义解决了
What I did last time was to show you how to handle motion in more than one dimension.
上节课的内容,是用多维矢量描述运动
Another way of saying that, stop me if this is wrong, but one way to say that is we've been assuming that politics is one dimensional, left/right and there might be other things involved: character or even among issues, even among political issues it could be more than one dimension.
换句话说就是,如果我说错了请纠正,换种说法就是,我们把政治假定为单一维度的,非左即右,然而它还涉及其他方面,比如性格问题,即使政治事务的处理也不是单一维度的
It is about 10,000 to one, the ratio 10000 of the nuclear dimension to the entire atomic dimension.
原子核和整个原子的大小比例,约为1:
But the regional dimension is one of them.
另外,但地域特点也很重要。
In fact, I'm going to use only two dimensions for most of the time because the difference between one dimension and two is very great.
实际上,大多数时候我只考虑二维的情况,因为一维和二维的差别很大
If I'm now working in one dimension, it's obvious because I'm not using any vectors.
假设我现在只考虑一维的情形,这很明显,因为我没有用矢量
You use it all the time, but maybe along one dimension.
你也许在一维空间里一直在用它
We said, "Let's take, for the simplest case that we can possibly imagine, namely a particle moving in one dimension along the x-axis with a constant acceleration a.
我们说过,"考虑我们可以想象的最简单的情况,即质点在一维空间运动,沿着 x 轴且保持恒定加速度 a
I think you can tell by analogy with what I did in one dimension that the position of that object at any time t is going to be the initial position plus velocity times t plus one half a t square.
你们可以类比一下我在一维情况下的结论,这个物体在任意时刻 t 的位移,等于初始位移,加上 v ? t + 1/2 ? a ? t^2
We know that this dimension is roughly one angstrom unit, right?
我们知道,它的尺寸大概是一埃,对吗?
One is the lowest dimension.
维数最小只能是1
应用推荐