国家植树节基金会向许多城市发起挑战，要求它们通过种植和保护更多的树木来赢得那面“美国树城”的旗帜。
The National Arbor Day Foundation has challenged many cities to earn its "Tree City USA" flag by planting and protecting more trees.
然后他们将业务扩张到了45个国家，在欧洲，美国，亚洲和非洲的的400多个城市中有531家店都坐落于重要的商业区。
Since then they have expanded operations into 45 countries with 531 stores located in the most important shopping districts of more than 400 cities in Europe, the Americas, Asia and Africa.
力挺HSR项目的主要理由之一是：21世纪的美国已经不再是一个由城市和郊区组成的国家了，而变成了城市建设研究学者理查德·佛罗里达所称的“特大城市群”。
One of the key ideas fueling HSR is that the U.S. in the 21st century has grown beyond a country of cities and suburbs to what urban-studies expert Richard Florida calls "mega-regions."
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