They have designed a system which pumps up water from nearly 1,000 feet below ground.
他们设计了一个能从地表以下1000英尺处抽水的系统。
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 system has been designed to operate above or below ground.
该系统被设计成在地面或地下运行。
An automated book retrieval system will reduce the amount of space needed for book storage. The library's two million volumes will be stored on two storeys above ground and two storeys below.
自动化图书检索系统大大减小了书籍的贮存空间，馆内二百万册的藏书被存放于两层地上空间和两层地下空间。
An automated book retrieval system will reduce the amount of space needed for book storage. The library's two million volumes will be stored on two storeys above ground and two storeys below.
自动化图书检索系统大大减小了书籍的贮存空间，馆内二百万册的藏书被存放于两层地上空间和两层地下空间。
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