通过翻译学英语
实例70.
自从二十世纪中叶以来，对石油需求量的增加，导致了在海上钻井取油。今天，海上钻井正在许多离开海岸很远的地方进行。
Since the middle of the 20" century, increased demand for oil has led to drilling offshore for oil. Today, offshore oil drilling is being carried out in many places at a considerable distance from the coast.
实例71.
核能发电，是在20世纪才发展起来的。不幸的是，建立和维持核发电厂的成本很高，使得建设速度要比原先预料的慢许多。
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