英语翻译
1.Hearing the names of these famous old friends-Yosemite,Yellowstone,Grand Canyon-revives memories of visits past and promotes dreams of those still to come.
2.The National Park Service ranks also include architects,historians,archaeologists,biologists,and a host of other experts who preserve and protect everything from George Washington's teeth to Thomas Edison's wax recordings.
3.Growing communities thirsty for recreational outlets are also working with the NPS to turn abandoned railroad tracks into bike and hiking trails,as well as giving unused federal property new life as recreation centers.
4.To help meet these challenges and take advantage of these opportunities,the National Park Service has formed partnerships-some dating back 100 years,some only months old-with other agencies,state and local governments,corporations,American Indian tribes and Alaska Natives,Park Friends groups,cooperating associations,private organizations,and community groups .
请再帮我特别讲解一下 其中 partenrship-some 与 old-with这两个地方的用法的原因.