求翻译：经过半个多世纪的发展，医院规模逐步壮大，现已成为一所集医疗、教学、科研、预防、保健、康复、急救为一体的大型综合性“三级甲等医院”。是什么意思？

After half a century of development, the hospital has gradually increased the scale, has now become a set of medical, teaching, research, prevention, care, rehabilitation, first aid, as one large integrated three level hospitals.

After more than a half-century of development, the hospital size, step-by-step growth has become a medical treatment, teaching, scientific research, prevention, health care, rehabilitation, and first aid to a large comprehensive "level 3," a hospital.

After more than half century development, the hospital scale expands gradually, already became a collection medical service, the teaching, the scientific research, the prevention, the health care, the recovery, the first aid was a body large-scale comprehensive nature “three level of first-class hos

After more than half a century of development, hospital size gradually growing, has now become a medical treatment, teaching, research, prevention, health care, rehabilitation, emergency as one of the large-scale comprehensive "grade hospital".

正在翻译，请等待...