最近，一些有关非洲大型河流系统（比如流向莱索托高地的河流）的稳固的水协议正取得积极的进展。
Recently, there has been progress towards durable water treaties for several big African river systems, such as the waters that flow down off the Lesotho highlands.
湍急的河流从熔岩高地上飞流直下，蜿蜒流经无垠的原始森林地带。
Turbulent rivers plunge from volcanic heights to meander through endless tracts of pristine jungle.
长输管道穿越河流或水网沼泽等地下水位较高地段，必须采取浮力控制措施。
As a long distance pipeline crosses rivers or water network and swamp areas where water tables are higher, buoyancy control measures must be taken.
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