Much of Oman is desert, but the Arabian Sea coast in the Dhofar region represents a startling difference in climate.

阿曼境内的大部分地区都是沙漠，但是阿拉伯海沿岸的佐法尔地区就有截然不同的美丽风景。

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Once they hit the edge of a cone, drops are propelled towards its base, the least curved region, because of the pressure difference caused by surface tension.

一旦水滴流到了圆锥体的边缘，就会在锥体表面张力所形成的压力差的作用下流向它的底座，那里是曲线弧度最小的地方。

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Much of Oman is desert, but the coast of the Arabian Sea in the Dhofar region represents a startling difference in climate.

阿曼的大部分是沙漠，但在阿拉伯海沿岸佐法尔的气候却明显不同。

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For starters, consider the fact that the degree of market failure varies from region to region: the difference between the price of water and its true marginal cost must be higher in dry places than wet ones.

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Last but not least, by improving the quality of their relationship with citizens, they can make a big difference to the attractiveness of their country, region or city as a place to live and work.

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For China, the deployment in the Gulf of Aden is as much about flying the flag and showing solidarity with a multinational effort as it is about making a real difference to the security of Chinese shipping in the region.

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