Before road works starts, the underground piping works under the road foundation should have already completed and backfill should have also completed according to design requirements.

道路工程施工前，路基下的地管工程应施工完毕，并按设计要求完成土方回填。

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Michael works on P.I., hunched over a long tube of PVC piping. He calls out to a nearby C.O. that he needs to grab more.

在PI工作中，Michael向前倾身，处理一条长的PVC管，他向附近的一个狱警请示说需要去拿更多的PVC管。

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Carbon capture and storage (CCS) works by trapping CO2 from the exhaust gases of fossil fuel power plants and then piping it to underground storage sites, such as disused oil wells.

而作为对比，如果利用碳捕捉与储存技术（CCS），在碳排放工厂进行碳捕捉然后将二氧化碳深埋在诸如废气油井一类的地方，每固定一吨碳需要成本达20-270美元。

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