求英文译文~A short History of the Changes in US Public Transporta

求英文译文~A short History of the Changes in US Public Transportation的部分内容如下.
Public transportation has undergone many changes in the US since colonial days.These changes reflect our nation's changes as a society.They also reflect how much the US has advanced technologically since its days as a British possession.
The first significant changes occurred in the middle of the 17th century when Boston established the first major travel routes in the colonies.These stagecoach routes gradually improved in the 18th and 19th centuries after the American Revolution.
In addition,the steamboat was also an important mode of public transportation in the US in the first half of the 20th century.The railroad developed into a major form of public transportation across the US in the middle of the 19th century.Airplane travel has become a popular form of public transportation since the end of World War II.
The US's dependency on railroad travel lessened during the first half of the 20th century after the Wright brothers invented the airplane.However,airplane travel did not become as popular until after World War II when the jet engine was modified for commercial use.

A short History of the Changes in US Public Transportation：一个简短的历史变化的我们公共交通
Public transportation has undergone many changes in the US since colonial days. These changes reflect our nation's changes as a society. They also reflect how much the US has advanced technologically since its days as a British possession.
The first significant changes occurred in the middle of the 17th century when Boston established the first major travel routes in the colonies.These stagecoach routes gradually improved in the 18th and 19th centuries after the American Revolution.
In addition, the steamboat was also an important mode of public transportation in the US in the first half of the 20th century.The railroad developed into a major form of public transportation across the US in the middle of the 19th century.Airplane travel has become a popular form of public transportation since the end of World War II.
The US's dependency on railroad travel lessened during the first half of the 20th century after the Wright brothers invented the airplane.However, airplane travel did not become as popular until after World War II when the jet engine was modified for commercial use.
公共交通自殖民时期以来在美国经历了许多变化.这些变化反映了我们国家的变化作为一个社会.他们也反映出多少天以来美国拥有先进的技术作为英国占有.
第一个重大变化发生在17世纪中叶,当波士顿建立第一个殖民地的主要旅游路线.这些公共马车路线逐步改善18、19世纪在美国革命.
此外,汽船也是一个重要的公共交通方式在美国上半年的20世纪.铁路发展成为一种主要的公共交通在美国19世纪的中间.飞机旅行已经成为一种受欢迎的公共交通自第二次世界大战的结束.
美国的依赖铁路旅行20世纪上半年减少后,莱特兄弟发明了飞机.然而,飞机旅行直到二战后才成为流行的商用喷气发动机时修改.