学生的毕业论文：真是天才啊！！！英语本科毕业有这种水平，不知该哭还是笑。有哪位同志知道他在说什么吗？帮他改改？
The United States is the federal system nation, The political power orgnized form for president system, practice three powers to sign seperately with the political system and two parties system that the check and balance combine together of party system.

Practice seperately the principle of the power and check and balance, lawmaking, administration, judicial three kinds of powers be take charge of by the national legislature, president, court respectively, three sections excercise the power, leading long to make each other, to attain the power balance.