求翻译：美国是一个历史比较短的移民国家, 旧有的思想文化保留得很少, 在多元文化、思想价值观的影响下, 能够较快地接受新的思想和文化, 发展的约束较少。是什么意思？

The United States is a relatively short history of the country of immigrants, old ideological and cultural retain very little under the influence of the multi-cultural, and ideological values, able to quickly accept new ideas and cultural development of the less constrained.

The United States is a relatively short history of the country of immigrants, the old ideological and cultural retention, and very few in a multi-cultural, and ideological values under the influence, to be able to relatively quickly accept new ideas and culture, and develop a less bound.

US is a historical quite short immigration country, has old the thought culture retains very much few, in the multicultural, under the thought values influence, can accept the new thought and the culture quickly, the development restraint are few.

United States is a relatively short history of the country of immigration, retain very little old ideology and culture, under the influence of pluralistic culture, values, and can quickly receptive to new ideas and culture, development of less restrained.

正在翻译，请等待...