back split

基本解释

The Lunar Orbiter Laser Altimeter (LOLA) works by sending a laser pulse through an optical lense that splits it into five beams that are each scattered back after they strike the lunar surface.
月球探测器上的激光高度计（LOLA）的工作原理为：发射一束激光脉冲，利用光学镜片将其分为五道光线，当光线到达月球表面后会自动反射至激光高度计上。
The bus pulled up in the middle of the road and, "The driver looks right at me, lets three people off the second door in the back, looks at me, closes the door, slams the throttle and splits.''
公交车在路中间停了下来，“司机看了我两眼，然后打开后面的门让两三个人下了车，又看看我，就直接关上了门，猛踩油门开走了。”
In the same way, species of lice on living animals and birds reflect the splits in animal and bird ancestry back to the time that lice first arose.
通过分析动物以及鸟类身上的虱子，同样能够折射出鸟兽的进化历程。

The way to test that is to track back along the branches leading from each existing language, and count the number of splits on each path before you get to the common ancestor of all.
ECONOMIST: Linguistic evolution: Received pronunciation The