A hole, usually with a cover, through which a person may enter a sewer, boiler, drain, or similar structure.

下水道出入孔：一种常带有盖的孔道，人可以由此孔进出排道、锅炉、下水管或类似设施。

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There was precious little cover within the confines of the sewer, certainly not enough to avoid any incoming fire.

想要靠下水道范围内的那点掩体躲避敌人火力是远远不够的。

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The testing method using fall size substance specimens is introduced for transmission shaft, oil well pipe, train pothook, cover of sewer well.

介绍了传动轴、油井管、火车挂钩、窨井盖等全尺寸实体试件试验方法与工程实际应用情况。

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Replacing concrete with porous pavement, employing green roofs and rain barrels, restoring creeks and wetlands, and increasing tree cover can help cities absorb rain water rather than funnel it to sewer systems.

WHITEHOUSE: Building the Future: Innovative Water Infrastructure