求翻译：1755年，学校改名为费城学院和研究院。1765年学校的第一届毕业生约翰·莫根创建了北美洲第一所医学院，使学校成为事实上的大学。但一直到1779年，宾夕法尼亚政府才通过立法对学校进行改组，将其正式命名为宾夕法尼亚州大学。1791年，校名又被缩为宾夕法尼亚大学。是什么意思？

1755, the school changed its name to Philadelphia College and Research Institute. John Morgan, the first graduates in 1765 school create North America's first medical school to become a de facto university. But not until 1779, the Pennsylvania government to pass legislation on school restructuring,

1755, the school was renamed the Philadelphia colleges and research institutes. The first session of the 1765 school graduates John Morgan created the North America, a medical school, the school becomes the de facto University. But it was not until 1779 that the Government would only through legisla

In 1755, the school changed name as Philadelphia Institute and the research institute.In 1765 the school first session of graduate John · not root founded the North America first medical school, causes the school to become in fact university.But continuously to 1779, Pennsylvania Government only the

In 1755, the school changed its name to Philadelphia College and Research Institute. 1765 first graduates of the school of yuehan·Mogen created the first medical schools in North America, the school became a de facto University. But until 1779, Pennsylvania Government passed legislation to restructu