Much of the Metrorail system, which opened in 1976, runs below ground, including a section that goes under the Potomac River between Washington and Virginia and one that goes over it.
大多数于1976年投入使用的地铁线路都是在地下的，其中有一段在Potomac河(一条流经华盛顿特区的河，译者注)下面，穿过华盛顿特区和弗吉尼亚州，还有一段则在地上横跨Potomac河。
The water under the bridge is now low and filthy, looking almost chemically polluted, with lots of litter thrown onto the dry ground just below the bridge.
在桥下面的水是现在低廉的和污秽，几乎用化学看污染，借由在正好低于桥的干旱接地之上被丢的许多凋落物。
Plans, directs and conducts survey work to analyse the likely behaviour of soil and rock when placed under pressure by proposed structures, and designs above and below ground foundations.
岩土工程师负责计划，指导和指挥调研工作，分析土壤和岩石在已设计建筑重压下的特性，设计建筑物上下的土基。可能需要注册或许可。
Plans, directs and conducts survey work to analyse the likely behaviour of soil and rock when placed under pressure by proposed structures, and designs above and below ground foundations.
岩土工程师负责计划，指导和指挥调研工作，分析土壤和岩石在已设计建筑重压下的特性，设计建筑物上下的土基。可能需要注册或许可。
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