In cities and towns with sewage systems, this wastewater combines in underground pipes, which actually aren't filled with feces.

在有污水系统的城镇里，这些废水在地下管道中汇合，而地下管道实际上并没有装满粪便。

One group of German scientists has tried coating warrior fragments with a plastic used to seal underground water pipes.

一队德国科学家尝试用密封地下水管的一种塑胶来覆盖秦俑碎片。

Water from underground pipes flows all the way up into the tall, above-ground section of the hydrant, called the barrel, even when the hydrant’s not in use.

来自地下管道的水一直向上流入消防栓高大的地上部分， 称为桶，即使在消防栓不使用时也是如此。

And they kind of suck in air and are able to extract the carbon dioxide, which they then through another process, kind of pipe underground so that it's permanently stored and can't get into the atmosphere.

他们吸入空气并能够提取二氧化碳，然后他们通过另一个过程，类似于地下管道， 使其永久储存并且不能进入大气层。