1. One cannot think of Africa without thinking of Egypt, the cradle of an ancient civilization, nor of Egypt without the Nile.
    想到非洲，人们不能不想到作为古代文明发祥地之一的埃及。同样，想到埃及，不能不想到尼罗河，

2. One of the best answers he's ever received came from an 86-year-old man who learned the ancient Chinese exercise form of tai chi as part of Wolf's study of how exercise can help seniors prevent falls.
    他得到的最佳答案之一来自一位86岁的老人。沃尔夫研究的是运动如何帮助老年人防止摔跤，而作为该研究的一部分，这位老人修习一种古老的中国健身法——太极。

3. Li Bai and Du Fu were famous poets in ancient China.
    李白和杜甫是中国古代的著名诗人。

4. In ancient Egypt, for example, the season when the Nile flooded the land was followed by the season when crops were planted and cared for.
    例如在古埃及，尼罗河水泛滥大地的季节后紧跟着便是种植和照看庄稼的季节，

5. Fortunately, however, ancient men made tools of stone, especially flint,
    然而，幸运的是，远古人用石头制作了工具，特别是用燧石，

6. For centuries the ancient Egyptians worshipped the Nile.
    千百年里，古埃及人对尼罗河顶礼膜拜。