陕甘宁盆地城华地区的华池油田华49井区、城壕油田玄马区、城63井区与城55井区目前均采用自然能量开采。
Well hua 49 area in Huachi oil field, Xuanma area, well 63 area, well 55 area in Chenghua region in Shan-gan-ning basin are now produced under natural water drive.
反观巴黎18区，在蒙马特鹅卵石街区不远处，法国世俗原则在理论上似乎比实践中更有效。
Back in the 18th arrondissement, not far from the cobbled streets of Montmartre, France's secular principles seem neater in theory than in practice.
“但就我在失事地点的经历来看，总会留下些些蛛丝马迹，”梅林在这部关于51区的纪录片中说。
"My experience with crash sites, however, is that there is always something left, " Merlin says in the Area 51 documentary.
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