这张脸的邋遢程度不亚于用沾满烂泥的手在大哭过的脸上抹过。
It could hardly have been grubbier if he had first rubbed his hands in the earth, and then had a good cry, and then dried his face with his hands.
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。
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.
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