South Korean pilots, averaging six or seven hours a week in the air, say their North Korean counterparts, flying older model MiGs, are lucky to fly once or twice a month.
南韩飞行员每周平均有六到七小时上天的机会，但他们的北方同行只能驾驶古老的米格战机，一个月或许才能有幸飞上一两次。
Also, the supply chain model and the operation mode of the water resources allocation in east line of the Project of water Transferring from South to North are developed.
并分析了南水北调东线水资源配置与调度供应链的概念模型和运作模式。
The model was applied to a forest transect in eastern China (NSTEC, North-South transect of eastern China) to investigate the responses of the transect to possible future climatic change.
改进后的模型被用于研究中国东部南北样带(NSTEC)植被和净第一性生产力对未来气候变化的响应。
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