在这一点上，在本人住的中央，水的供给充沛时，但即便是在凉快的和多雨的中央像英国，有些时分干旱和欠缺能够叫用水限制。

At this point, where I live, the water supply is plentiful, but even in cool and rainy places like England, there are times when droughts and shortages can call for water usage restrictions.

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至少另有其它18个国家将有可能面临同样严重的水欠缺需要解答的题目。

At least 18more countries are expected to have severe water problems. The demand for water keeps increasing.

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水铁矿结晶弱，结构表征困难，对其在环境中的分布、组成、结构及性质的认识较欠缺。

Ferrihydrite is poorly crystallized, which makes the determination of its structure more difficult. The distribution, composition, structure and nature are not yet very clear.

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