英语翻译翻译一句话:这段历史为帮助美国成为世界第一大国奠定了良好的基础.谢绝翻译机.世界第一经济大国 怎么说?

This period of history helps the usa to build the good foundation to become the greatest country in the world.

This phase of history has establish the fine basis for to helping USA to become the first largest the country in the world.

This period of history to help the U.S.become the world's superpower has laid a good foundation.
问题补充：
The world's largest economy

This period of history for helping the United States as the world's biggest has laid a good foundation.