1. The Population Council report found that while most countries have done extensive research on women as mothers, men as fathers have been virtually invisible to researchers.
    人口委员会的报告发现，尽管多数国家都对身为母亲的女性做了大量研究，但对身为父亲的男性，研究者们却几乎视而不见。

2. He made an extensive report yesterday afternoon.
    他昨天下午做了一个广泛的详尽的报告。

3. Despite one of history's most extensive search efforts, involving more than 300 planes and dozens of ships, the Navy found nothing, not even an oil stain floating on the water.
    尽管美国海军发动了有史以来范围最大的一次搜寻，动用了300多架飞机和几十艘战舰，依然一无所获，甚至没发现一点油迹漂在水上。

4. Despite extensive efforts by many schools to make good roommate matches, unsatisfactory outcomes are common.
    尽管许多学校已做了广泛的努力来为学生安排合适的室友，但常常有不如人意的结果。

5. Much of the country has already been clear-cut, and soil erosion has been extensive.
    这个国家许多地区的树木已被砍伐殆尽，而且土地流失范围十分广。

6. It stands as the most extensive survey to date on how humans vary at the level of their genes. The book's firm conclusion:
    它对人类在基因层面上的差异作了迄今为止最为广泛的调查，得出了明确的结论：