and more powerful -- and then within a short time, within a few decades after their peak, they collapse. For example, the classic lowland Maya of the Yucatan began to collapse in the early 800s -- literally a few decades after the Maya were building their biggest monuments, and Maya population was greatest.
短期間内 数十年 以内に崩壊します 例えば ユカタンの古代低地マヤ文明は800年代初期に崩壊しましたが それはマヤの人口が最大に達し 最大の記念碑を建ててから 文字通り数十年後のことでした