提高听力同时，你还可以了解到美国历史上的一些重要事件。请感兴趣的你一听为快吧！


<注意>国家名大写
hints：Monroe Doctrine;James Monroe
The Americans won important battles on land and sea. Weakened and in debt from its recent war with France, Britain signed a peace treaty with the U.S. in 1815. The U.S. victory made sure that Britain wouldn't establish colonies south of the Canadian border. By 1815, many of the new nation's problems had eased. Under the constitution, the United States had a balance between liberty and order. The country had a low national debt. Much of the continent was left to explore. The country had peace, prosperity, and social progress. An important addition to foreign policy was the Monroe Doctrine. President James Monroe's announcement of solidarity with newly independent nations in Central and South America was a warning to Europe not to seek colonies in Latin America.
美国人赢得了在陆地和海洋的重要战役。减弱在其最近与法国的战争债务，英国在1815年与美国签署一项和平条约。美国的胜利使得英国不会建立殖民地在加拿大边界以南。到1815年，许多新的国家的问题有所缓解。根据宪法规定，美国在自由与秩序之间有平衡。该国有很低的国家债务。非洲大陆的大部分被探索。该国和平，繁荣，社会进步。外交政策的重要补充了门罗主义。总统詹姆斯门罗宣布的团结与中美洲和南美洲的新独立的国家是欧洲的警告，不寻求在拉丁美洲的殖民地。