处于志留记之后，密西西比纪或石炭纪之前，森林和两栖类的出现是其特征。
Silurian '. 'and before the Mississippian or Carboniferous Period, and characterized by the appearance of forests and amphibians.
例如，在19世纪，一场大地震改变了密西西比河，一条流经美国中部的大河的流向。
For example, in the 1800s a monstrous earthquake changed the course of the Mississippi River, a large river flowing in the central part of the United States of America.
历史学家认为，19世纪一再发生的蝗虫入侵改变了美国密西西比河以西的农业格局。
Historians credit repeated locust invasions in the nineteenth century with reshaping United States agriculture west of the Mississippi River.
自从20世纪，工程师们回转了芝加哥河的流向，伊利诺伊州便将密歇根湖的水顺着密西西比河一路向下送至墨西哥湾。
Since 1900, when engineers reversed the flow of the Chicago river, Illinois has sent Lake Michigan water down the Mississippi to the Gulf of Mexico.
其他的近郊区和郊区是原来密西西比河沿岸的两处核心定居点，最终于19世纪70年代被吸收进入城市。
Other faubourgs (outskirts, or suburbs) were laid out above and below the two nuclear settlements and across the river and were finally absorbed into the city by the 1870s.
故事发生在19世纪上半叶密西西比河畔的一个普通小镇上。
The story happened in 19th century Mississippi River an ordinary town.
故事发生在19世纪上半叶密西西比河畔的一个普通小镇上。
The story happened in 19th century Mississippi River an ordinary town.
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