The survey was repeated in 2007 and 2008, with about three-quarters of the original group taking part in all three.
2007年和2008年都重复进行了这项调查，第一次受访的儿童有四分之三都参与了这三次调查。
Peru was excluded from the original group of high-burden countries, having met the targets and successfully reduced incidence.
秘鲁由于已实现这些目标和成功地降低发病率而被从最初一组负担沉重国家中排除。
Bryophyte is a kind of higher plants with small size and simple structure, being the transitional form from aquatic to terrestrial and the most original group of existing higher plants.
苔藓植物是一种形体微小、结构简单的高等植物，是水生向陆生的一种过渡形式，是高等植物中最原始的类群。
Chinese ancient marriage institutions once went through the patterns of original group marriage, consanguineous group marriage, sub-consanguineous group marriage and duality marriage etc.
中国古代婚姻制度曾经历了原始群婚、血缘群婚、亚血缘群婚、对偶婚等形态。
From the original group, 604 people were re-interviewed.
从最初的人群中，有604人接受了重新访问。
From the original group, 604 people were re-interviewed.
从最初的人群中，有604人接受了重新访问。
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