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虽说采矿现场爆炸的实际气体释放量要小一些、但由于气体释放量随着爆炸条件的变化而变化、所以依然是个问题、而且难以准确予以量化
expl.	Though of a lesser magnitude, the actual mine site emissions from detonation may be problematic as they could vary according to detonation conditions and are difficult to quantify precisely