在确保安全的基础上，选取合理的矿块结构参数，对矿山设计和建设尤为重要。
On the basis of safety production, selecting appropriate parameters of ore block structure is particularly important for the design and construction of the mine.
气候变化将会使二者关系进一步复杂化，使人类陷入进退两难的困境——在确保安全的基础上，各国如何做到维护气候系统和完成能源指标之间的平衡。
Climate change is expected to complicate this relationship still further, presenting us with a Shared dilemma about how to balance our climate and energy objectives while preserving security.
在确保安全生产的基础上，确立了完井过程中的防腐工艺技术，提高了气井的生产周期和经济效益。
Based on making sure operation safely, antisepticise tech in well completion peri od is established and yield cycle of gas well and economical benefit is increased.
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