慢速英语:American History Series: Indian Wars

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too to太……而不能

例句：He is too uncompromising to excuse the children's mistakes.
      他坚决不肯原谅孩子们的错误。

2.The Santee Sioux lived along the northeastern edge of the Great Plains in what is now the state of Minnesota.

what is now the state of Minnesota
what引导宾语从句

3.In exchange, the United States agreed to make yearly payments to the tribe.

in exchange作为对…的交换

4.The government decided to put aside an area of land for each tribe.

put aside撇开, 储备

例句：One should always put a little money aside for a rainy day.
      一个人总应积攒点钱以备不时之需。

      I have put aside 5 minutes to talk to you.
      我抽出五分钟来与你交谈。