问答题

We should search as widely as possible and with every available means for sources of fresh water that seem to be the least costly.

【参考答案】

我们应该在尽可能大的范围内，并以一切现有的手段去寻找可能是最廉价的淡水源。

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Our laboratory is not large, neither is the equipment up-to-date. But still we have achieved remarkable success in our research work.

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