So let's add an axis for roundness.

让我们添加一个圆的轴。

That's because our planet's axis is actually moving.

这是因为地轴其实也在变化。

It has an axis of symmetry running up and down.

它有一个自上而下的对称轴。

Geologists classify crystals by assigning three axes to the unit cell.

宝石学家通过在晶胞中指定三条轴来区分晶体。

The line connecting all of the dots represents the axis of meaning.

连接所有点的线代表意义的轴线。

These are cylindrical, weight-bearing structures that run parallel to the bone's axis.

这些是圆柱形的负重结构，平行于骨头的轴。

Now I rotate it horizontally on its center axis until the lights turn green.

现在沿着中轴水平旋转它，直到灯号变成绿色。

It wants to circle its axis, wants to circle around that force direction.

它想绕着轴，绕着力的方向旋转。

Profane space has no axis Mundi, no cosmic tree or pillar leading to the heavens.

世俗空间没有轴心，没有通向天堂的宇宙树或支柱。

A circle actually has infinite axis of symmetry, except poor Mr. Parallelogram, no access for you.

圆实际上有无限的对称轴，除了可怜的平行四边形先生，你无路可走。

The equation is a way to compare these axes to describe how squashed the ellipse is.

这个方程是比较这些轴来描述椭圆扁平度的一种方式。

Under normal rolling conditions, the forward motion of the suitcase is perpendicular to the wheels' axis of rotation.

在正常滚动的情况下，行李箱的前进运动与轮子的转动轴垂直。

The ball takes off, pointing towards the air pushing against it, wobbling around its reference axis.

球起飞时指向空气，空气推着它，绕着参考轴摆动。

But there's something else about the Earth's axis: it isn't exactly straight up and down.

但地轴有些特别，它并不是上下垂直的。

Religious reverence slowed farmer's axes and even led the city to plant additional trees in urban parks.

宗教敬虔放慢了农民挥动斧头的速度, 甚至导致该城市在城市公园 种下了另外的树木。

Imagine for a moment that the Earth's axis were exactly perpendicular to its orbit, straight up and down.

想象一下，如果地球自转轴与公转平面垂直。

As we spread out, a slight shift of the earth's axis Away from the sun cools the planet.

随着人类的分散，地轴相较太阳的轻微偏转，使得地球温度有所下降。

The Earth's rotation helps organize this motion into huge cylindrical rolls that align with the Earth's axis.

在地球自转的帮助下，外核中产生了与地轴平行的滚筒式对流。

And while it's moving around the sun, Earth is also spinning around in place around an imaginary line we call the axis.

当它绕着太阳公转的同时，地球也在绕着一天想象的轴自转。这条轴叫地轴。

It was so superior to existing tools that soon others were following the inventor's lead and making hand axes of their own.

它优越于现存的工具，其他人很快群起而效之，纷纷制作了他们自己的手斧。