Three-dimensional space is defined by x, y, and z axes.

立体空间可用x，y，z描述。

You'll sometimes see another one, k, which represents the z axis.

有时你会看到另一个， k，代表 z 。

X and Y position, but move along the Z axis.

X Y 位置，但沿 Z 移。

And you can think of reference frame like a Cartesian coordinates, like X, Y, and Z axes.

你可以将参考系想象成笛卡尔坐标系，就像X、YZ样。

What about in three dimensions? Well, you add a 3rd axis called the Z axis, which is perpendicular to both the x and y axes.

在三维空间中呢 你添加了第三个 叫做Z 它与xy都直。

At their core, split diopters enable dynamic compositions along the Z axis of a frame rather than point an audience's attention to one subject, a split diopter creates multiple planes of action.

- 本质上， 分体式取景器能在画面的Z上态构图， 而不是将观众的注意力集中在单一主体上；它创造出多个作层面。

What was happening was that this T cell was physically overlapping just along the line of sight, the Z axis, with a completely different cell, a neighboring dendritic cell, which was genuinely PD1 positive.

发生的情况是，这个T细胞在视线方向，即Z上，与另一完全不同的细胞——邻近的树突状细胞发生了物理重叠，而该树突状细胞确为PD1阳性。

Or rather, I should say p orbitals, because we're talking about 3 dimensional space here, so there can be one on the x axis, and one on the y axis, and one on the z axis.

或者说，我们应该说p轨道，因为我们讨论的是三维空间， 所以可以在x上有一个，在y上有一个， 在z上也有一个。

It's like how in solving a Rubik's cube, order matters a lot, Or how rotating a cube about the z axis and then about the x axis gives a different final state from rotating it about the x axis, then about the z axis.

就像在解魔方时，顺序很重要， 或者先绕 z 旋转立方体， 然后再绕 x 旋转立方体， 与先绕 x 旋转，然后再绕 z 旋转立方体会产生不同的最终状态。