Michael告诉他哥哥，他找到了通往医务室大楼的路径，但他需要想个办法出来，能够不用梯子就爬上20英尺高的垂直排水管。
Michael tells his brother that he found their access to the infirmary building, but he'll need extra time to find out how they'll get up a twenty foot vertical drain pipe without a ladder.
他们用排水晒田的办法处置了潮湿的土地。
从工程施工实践的角度，剖析了高速公路通讯管道防排水工程设计与施工中出现的一些问题，并提出了解决的办法。
For construction practice, the paper analysed some problem in waterproof, drainage design and construction of freeway communication conduit, proposed some methods for solving the problem.
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