The purchase of an A380 jet is part of China's efforts to accommodate surging air travel demands unleashed by the country's economic boom.
中国经济的腾飞促使了空中旅游需求的增加，购买一辆A380喷气式飞机是中国适应空中旅游需求激增所做努力的一部分。
Through calculation of concrete instance, it is clear that coal mine main drainage pipeline cleaning by high pressure water jet has remarkable economic benefits.
最后通过对具体实例的计算，说明了清洗煤矿主排水管道具有显著的经济效益。
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