因此，他将应用范围有限且效率低的蒸汽泵改造成了应用范围广泛的蒸汽发动机。
He thereby transformed an inefficient pump of limited use into a steam engine of a thousand uses.
典型的工艺是先钻井，然后通过井眼将蒸汽泵入地下，油砂中的沥青被蒸汽熔化，这样便容易被抽吸至地面。
Typically it involves drilling wells to pump steam into the ground to melt the bitumen and make it easier to suck up to the surface.
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