The system helped cause the South to be the poorest part of the United States for many years.

VOA: special.2010.02.04

Every advanced country in the world has a system that provides for this, including the United States, incidentally.

世界上每一个发达国家,顺便一提，包括美国在内，都有应对这些情况的制度。

耶鲁公开课 - 金融市场课程节选

What do you think about the two-party system in the United States?

你认为美国的两党制怎么样？

两党制度的优缺点 - SpeakingMax英语口语达人

This week,we tell about the biggest system of freshwater lakes in the world, the Great Lakes between the United States and Canada.

VOA: special.2009.11.11

In the United States we did not have a central bank until 1913 when we created the Federal Reserve System.

在美国，我们直到1913年,创立了联邦储备银行制度。

耶鲁公开课 - 金融市场课程节选

Russia objects. But the United States says the system would protect Europe from a possible attack by Iran.

VOA: special.2009.05.23

But if the system is in equilibrium, none of those states has lower enthalpy.

但是如果系统处于平衡态，所有其他的态都不可能具有更低的自由焓。

麻省理工公开课 - 热力学与动力学课程节选

The United States Forest Service soon had trees planted in some areas and a rough road system built.

VOA: special.2009.07.20

But Hobbes lived at a time when the modern system of European states even as we understand them today, was just beginning to emerge.

霍布斯生活在一个时代,这个时代中，现代欧洲国家,就像我们今天理解的这样，已经快要出现了。

耶鲁公开课 - 政治哲学导论课程节选

This week on our program, we take a look at the jury system in the United States.

VOA: special.2009.08.31

So the point is, once you're at equilibrium none of the other states they're accessible, the system could rearrange itself to form them, but there is no accessible state that has higher entropy than the equilibrium state.

所以要点在于，如果你处于平衡态,其他所有的态都无法达到，我们可以重组体统来形成这些态，但没有一个可以达到的态,有比平衡态大的熵。

麻省理工公开课 - 热力学与动力学课程节选

Last year, almost two hundred seventy-five million people visited the national park system in the United States.

VOA: special.2009.09.28

In fact, you have to put that qualifier on just about anything you say in finance because the tax system is infinitely complex and every country has different taxes, different states have different taxes.

事实上你必须进行改进,不管你是在谈论哪个金融学问题,因为税制太复杂了,每个国家的税制不同,每个联邦州的税制不同

耶鲁公开课 - 金融市场课程节选

Finally,the United States Supreme Court ruled that racial separation in the Montgomery bus system was unconstitutional.

VOA: special.2011.01.17

President Obama has signed legislation to reform the health care system in the United States.

VOA: special.2010.03.26

One year ago, the United States financial system was in danger of collapse.

VOA: special.2009.09.18

The United States built a national highway system to expand transportation.

VOA: special.2010.03.19

What we're trying to do here is to change the system in the United States from one that is based on the time that is spent in the seat to one that is based on your actual accomplishments."

VOA: special.2010.02.25

U.S.officials say the system is needed to defend Europe and the United States against potential threats from countries such as Iran.

VOA: standard.2009.07.15

The system was produced by the state-owned Rafael Arms Development Authority and is partially financed by the United States.

VOA: standard.2010.07.20

(RECORDING) Mr.Fischer said President Obama told him that the United States would not be building a missile-defense radar system on Czech territory.

VOA: standard.2009.09.17

Biden stressed that the new missile defense system would provide more security for the United States and the North Atlantic Treaty Organization,or NATO.

VOA: standard.2009.10.23

So the United States does not even know if the system works,". The missile defense system was discussed during the recent Obama-Medvedev summit in Moscow.

VOA: standard.2009.07.15

Poland's Prime Minister Donald Tusk says his country still remains loyal to the United States, despite the decision to scrap plans to build the anti-missile system.

VOA: standard.2009.09.17

In addition the prime minister has been criticized for supporting a controversial anti-missile defense system that the United States considers building in the Czech Republic and Poland.

VOA: standard.2009.03.25

But things are starting to change. New legislation that's been introduced in the U.S.Congress would require all states to implement what's called a "Graduated Driver Licensing" system.

VOA: standard.2010.06.24

The president addressed participants at the rally in a video message, pledging to work together with Congress this year and fix what he called the United States "broken immigration system."

VOA: standard.2010.03.21

They carved the first hiking trail to the top of Mt.Whitney, the highest mountain in the continental United States and they built the first museum in the National Park system.

VOA: standard.2009.11.25

Czech Prime Minister Jan Fischer said President Obama told him early Thursday that the United States is abandoning plans to build a defense system in Poland and the Czech Republic aimed at intercepting missiles from other countries.

VOA: standard.2009.09.17

civilian legal system. "Under domestic criminal law, the moment the person is in the hands of the United States government, they are entitled to be told they have a right to a lawyer and can remain silent,"

VOA: standard.2009.11.25