到2025年，将有18亿人生活在绝对缺水的国家或地区，而且有三分之二的世界人口将会生活在用水紧张的条件下。
By 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity, and two-thirds of the world's population could be living under water stressed conditions.
结论：神经质人格与紧张、松弛条件下的认知操作测试总分无关，而与紧张性-松弛性认知方式存在相关关系。
Conclusion: Neuroticism does not relate with total scores of cognitive performance under tightened and relaxed cognitive condition, but with tightened-relaxed cognitive styles.
本文测试了低空大速度飞行试验条件下飞行紧张因素对飞行员呼吸系统的影响。
The effects of the mental tense factor in high speed flight tests at lower altitude on pilots respiratory system are reported in this study.
目的：观察缺氧条件下血管紧张素-2对培养的血管内皮细胞分泌内皮素的影响及茶多酚的保护作用。
Objective:To observe changes of expression level of endothelin in endothelial cell after exposure to angiotensin-2 in hypoxia and investigate the protection manchanism of tee polyphenols.
现代战争的战场情况瞬息万变，紧张程度越来越高。传统的指挥方式和手段不能满足在战况急速变化条件下指挥作战的需求。
With the rapid changes of battlefield environment and situation in modern war, traditional command mode and means can hardly meet the command requirement.
现代战争的战场情况瞬息万变，紧张程度越来越高。传统的指挥方式和手段不能满足在战况急速变化条件下指挥作战的需求。
With the rapid changes of battlefield environment and situation in modern war, traditional command mode and means can hardly meet the command requirement.
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