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RobertKunzig 《科学与生活》2003,(3):76-80
TEPPING OUT ONTO THE RIVERBANK，WITH HIS FELLOW travelera watching expctantly and the goats bleating querulously in the canoe behind him,the farmer must have felt a surge of relief,They had paddled 20 miles up the small river from the sea,They had been at sea for weeks or perhaps months before that,Now,stretching before them in this dry season,they saw the river‘s source,a large lake of clear,sweet 相似文献
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