前后各一个
before and after───前后，之前之后；[电影]天伦劫
before after───之前之后
before one───当前
one before───前一个
one after───一个接一个
one after one───一点零一分
crossbite braces before and after───反牙撑前后
one and one───一加一
one after another───adv.接连地；一个接一个地；相继地，依次地; 先后; 连; 接二连三
This method tells you all information you need to know: whether one node is descendant of an ancestor of the other, whether it is before or after, and so on.───这个方法告诉您所有想知道的信息：一个节点是否是另一个节点的祖先的后代，它是在前面还是后面呢，等等。
But soon Smith is reporting even before it happens—and it's all terrible—one disaster after another.───但很快，史密斯甚至在事情发生之前就开始报道了，这是一场又一场可怕的灾难。
Take the great American scientist Thomas Edison as an example. He tried experiment after experiment and had one failure after another before he finally invented the bulb.───以伟大的美国科学家托马斯·爱迪生为例，他做了一次又一次的实验，失败了一次又一次才最终发明了灯泡。