Many patient taxonomists from several European countries and America then sieved through litres of muddy gravel with microscopes and pairs of tweezers to see what treasures had been captured.

来自欧洲几个国家和美国的许多分类学家耐心地用显微镜和镊子对数以升计、沾满烂泥的沙砾进行筛分，来看看什么样的宝贝被铲了上来。

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America and several European countries drew the opposite inference.

美国与一些欧洲国家则得出相反的推论。

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America and European countries still impose sanctions of varying severity.

美国和欧洲国家仍然施加着严厉程度不同的制裁。

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Christoph Wolff, a Bach expert at Harvard University, noted that the collection includes works for a variety of genres and from many different European countries and America.

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Many patient taxonomists from several European countries and America then sieved through litres of muddy gravel with microscopes and pairs of tweezers to see what treasures had been captured.

ECONOMIST: Biodiversity

The answer: in northern European countries and in America's upper midwestern states, such as Minnesota, Iowa and Wisconsin.

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