And I don't like that negative sign in the mean.

而且我不喜欢这负号。

See any circles with two negative signs?

看到任何带有负号的圆圈吗？

So that just alternating series with plus and minus signs as the coefficient.

因此这只是以负号交替的级数作为系数。

Anyway, this is all just to say that the change in potential energy is negative F times the change in position.

负的F(力的大小)乘以位置变化量有负号是因为 如果你让这力一直推着你。

Well I will now magically separate the negative sign from the 4. 1, 2, abracadabra.

好吧，我现在神奇地负号与 4. 1, 2, abracadabra 分开。

If they don't, draw a plus on the three unmarked coins if they're heavier or a minus if they're lighter.

如果他们不这样做， 则在三枚未标记的硬币上画一号， 如果它们更重，或者如果它们更轻， 则画一负号。

Now it is negative 1 time 4. With multiplication you can detach and reattach positive or negative signs from the number.

现在它是负数 1 乘以 4。通过乘法，您可以从数字中分离并重新号或负号。

If you ignore the negative signs for a minute these are the exact same numbers arranged in the same pattern as in the main triangle.

如果您暂时忽略负号，这些数字就是按照与主三角形相同的模式排列的完全相同的数字。

This value – the charge of a single electron in Coulombs – is known as the elementary charge, and it's denoted with a lowercase " e" .

一负号。这值，值 一电子的电荷，以库仑为单位，你知道。

First off, the convention in the context of Fourier transforms is to think about rotating in the clockwise direction, so let's go ahead and throw a negative sign up into that exponent.

首先， 傅里叶变换的惯例是考虑顺时针方向旋转，所以让我们继续在该指数中添一负号。

So plus X times the negative expected value of Y. So I'll just say minus X times the expected value of Y. And that negative sign comes from this negative sign right over here.

所以上 X 乘以 Y 的负预期值。所以我只说负 X 乘以 Y 的预期值。负号来自这里的负号。

Now, if you want to calculate the magnifying power of the telescope, just start with the same equation you used for the magnifying lens, but with a negative sign, because the image is flipped.

现在，如果你想计算望远镜的放大倍率，只需从用于放大镜的相同方程开始， 但要上一负号， 因为图像是翻转的。

Which means that the induced emf in a coil of wire is equal to the number of coils, times the change in magnetic flux over the change in time, all multiplied by a negative sign.

这意味着线圈中的感应电动势为 等于线圈数乘以磁通量随时间变化的变化，全部乘以负号。

Geometrically, the meaning of this function is that for any input vector X-Y-Z, you consider the parallelopyped defined by this vector, V and W, then you return its volume with a plus or minus sign, depending on orientation.

几何上 这函数的意义是 对于任何输入向量X-Y-Z 你考虑由这向量V和W定义的平行体 然后你返回它的体积 根据方向带号或负号。