60.the change button between relative motion and true motion in the panel does not touch firmly

面板上的真运动与相对运动转换按钮接触不良。

And this banana has no relative motion towards the planet.

而且这个香蕉对地球没有相对运动。

But tribology is also defined as the science of interacting surfaces in relative motion.

但摩擦学也被定义为在相对运动中相互作用的表面的科学。

So, interacting surfaces in relative motion: there are a lot of those in the world.

因此，相对运动的相互作用表面：世界上有很多这样的表面。

Even with the same mathematical trick of considering relative motions, we're left with more unknowns than equations describing them.

即使使用考虑相对运动的相同数学技巧，我们留下的未知数也多于描述它们的方程式。

The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth's interior.

承载这些大陆的板块的相对运动已经被详细构建，但是一个板块相对于另一个板块的运动不能轻易地转化为相对于地球内部的运动。