1·It's exciting to discover traces of earlier civilizations.
发现以前文明的遗迹，真令人兴奋。
—— 《牛津词典》
2·There were great civilizations, splendid empires, but no freedom anywhere.
这里有伟大的文明，辉煌的帝国，但没有自由。
3·One of the challenges that faced ancient civilizations like Egypt was timekeeping, calendars.
像埃及这样的古代文明面临的挑战之一是计时，也就是日历。
4·Glaser claims that these earth works, built between AD 400 and 1400, were at the heart of urban civilizations.
格拉泽声称，这些建于公元400年至1400年间的土方工程是城市文明的核心。
5·Now it seems the richness of the Terra Preta soils may explain how such civilizations managed to feed themselves.
现在看来，Terra Preta 丰富的土壤可以解释这些文明是如何养活自己的。