VOA慢速英语:A Look Into the Life, Music and Art of American Indians

例句：A king governs in that country.
      那个国家由国王统治。

2.cooperation n.合作,协力,合作社

例句：We calculate on their cooperation.
      我们指望着他们的合作。

3.discrimination n.歧视

例句：He spoke out against racial discrimination.
      他声言反对种族歧视。

辨别; 辨别力, 识别力

例句：These robots are capable of shape discrimination.
      这些机器人能辨别形状。

4.predefine vt.预先确定

5.reservation n.(美洲印第安部落的)居留地

例句：Most of these workers are American Indians living on reservations.
      这些工人中的大多数是住在居留地的美洲印第安人。

6.professionally adv.专业地;内行地

例句：A professionally installed alarm will cost from about ￡500.
      请专业人员安装的警报器要花费至少500 英镑。

      He has wrestled professionally for five years.
      他从事摔跤已经5年了。