By then more than 70 percent of large US cities used lead water lines.

到那时，超过 70% 的美国大城市使用铅水管线。

45.the drain pipes to be installed from the boiler flat and hot water well flat to bilge well for leading the waste oil water.

排放阀应装在从锅炉底和热水井底到污水井用于导废油废水。

The UN's humanitarian agency has painted a bleak picture of the situation for displaced people in Gaza saying they're competing for a critically short supply of water, food and medicine leading to growing tensions.

联合国人道主义机构对加沙流离失所的人员的情况描述是一幅惨淡的景象，称他们正在争夺严重短缺的水、食品和药品，导致局势日益紧张。