Given the current Gulf of Mexico oil-spill disaster it's easy to become cynical and imagine the fragile terrestrial worlds of the solar systems being ravaged for greed and profit.

鉴于最近的墨西哥湾的燃油泄漏灾害，已经被冷嘲热讽了，想象一下脆弱的太阳系陆地世界被贪婪和利润蹂躏。

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Natural runoff variety and current forecasting researches are very useful for terrestrial water cycling and water balance research and water resources management.

河川天然径流量变化与趋势预测研究对陆地水循环与水量平衡研究和水资源利用等均有重要意义。

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When this happens, billions of years from now, the terrestrial month will be longer — about 40 of our current days — because during all this time the Moon will continue moving away from us.

这种情形发生的时候，已是距今几十亿年以后的事了，陆地上的一个月会变得更长——大约是现在的40天——因为在此期间月球将持续远离我们。

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