The National Arbor Day Foundation has challenged many cities to earn its "Tree City USA" flag by planting and protecting more trees.
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 page will use a Data Tree to display all of the states and cities in a hierarchical view.
此页面将会使用一个DataTree在一个层次视图中显示所有的州和城市。
With its world-famous landmarks such as the Eiffel Tower and the Arc DE Triomphe, and its wide, tree-lined streets, Paris is one of the most beautiful cities in the world.
拥有埃菲尔铁塔和凯旋门这样驰名于世的地标性建筑，以及绿树成荫的宽阔街道，巴黎不愧是世界上最美丽的城市之一。
Air pollution of Britain's cities had caused serious harmfulness, and the health and life of townspeople, as well as flower, grass, tree, building, climate and so on, had been in serious danger.
英国城市大气污染曾造成严重危害，不仅人们的健康和生命受到了威胁，而且花草树木、建筑物和气候等也深受其害。
The cities in the region natural scenery pattern, just like the fruits on the tree of life.
城市之于区域自然山水格局，犹如果实之于生命之树。
If I were a Sapling, I would like to grow into a tree quickly so that I can become a huge umbrella to stop sunshine for people and prevent sand for cities.
如果我是一棵树苗，我愿意迅速成长为一棵树，因此我能成为一把巨大伞阻挡阳光为人们和阻挡风沙为城市。
The leaves on the tree become cars that can be moved around cities and even to the space.
树上的叶子变成汽车，可各地的城市，甚至到空间中移动。
The leaves on the tree become cars that can be moved around cities and even to the space.
树上的叶子变成汽车，可各地的城市，甚至到空间中移动。
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