But the phenomenon of Coal spontaneous combustion is quite serious, it badly restricts safe production and development of high-productivity and high-efficiency mines, At the same time it brings huge resource waste, environment pollution, the loss of personnel and property.
但是，煤炭自燃现象却比较严重，严重制约了高产高效矿井的安全生产与发展，造成巨大的资源浪费、环境污染、人员和财产的损失。
参考来源 - 超长综放面煤层自燃火灾防治技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A homofermentative strain, Lactobacillus rhamnosus was domesticated to produce L-lactic acid with high(efficiency) and productivity under high sugar and lactic acid(concentrations).
鼠李糖乳杆菌经实验室耐高糖高酸选育，能够在高糖浓度下高效高产L-乳酸。
The injection mold cavity made as mentioned has the advantages of high emulation, good economic efficiency and high productivity. The mold - making method is worth of spreading.
用这种方法制造注塑模型腔，具有仿真度高、经济效益好、生产效率高的优点，是一种值得推广的制模方法。
Another is due to users high requirements to improve productivity and economic efficiency, they made significant improvements in machinery high-speed and continuous.
另外一个是由于用户们对提高生产能力和经济效益的要求很高，他们在机械的高速化和连续化上作了显著地改进。
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