In its 1903 decision in the case of Lone Wolf v. Hitchcock, the United States Supreme Court rejected the efforts of three Native American tribes to prevent the opening of tribal lands to non-Indian settlement without tribal consent.
楼主加强阅读能力很重要啊,中文翻译的再好也还是怪怪的。
断句很重要,会让句子更容易理解。
前面是个modifier修饰the supreme court
the United States Supreme Court (s) rejected (v) the efforts of three Native American tribes (o) to prevent the opening of tribal lands to non-Indian settlement without tribal consent