Forward and back and forward and back and forward and back and forward and back.

前进、后退、前进、后退、前进、后退、前进、后退。

And the posh way is forward and back.

豪华的方式是前进和后退。

So your lip corners are very important and they can move forward and back.

所以你的唇角很重要， 它们可以前后移动。

Only the last part of the novel is told in the normal way. The other three parts move forward and back through time and space.

书中只有后半部分是以一种正常方法叙述的。其他三个部分的叙述时间和空间来回穿梭。

If you're driving in a car and you're wearing your seatbelt and you suddenly hit something, your whole body goes forward and back.

如果你正在开车并且系好安全带，突然撞到什么东西，你的整个身体会前后晃动。

And if you go round and round, the cube just goes on a sort of vortex journey, but forward and back crushes it and does the job.

如果你一圈又一圈地转，立方体就会进行一种漩涡之旅，但前后会挤压它并完成工作。