1 The things pile up in parks, courtyards, alleyways and any available open space, often dumped carelessly on top of each other, sometimes making it difficult for pedestrians to walk down a street unimpeded.
这句话里的unimpeded 是什么用法啊？可以说的详细点吗？
2 He promised to allow justice to run its course unimpeded...
这句话里的unimpeded 又是什么用法
都是后置定语修饰整个句子吗？后置定语不是只能修饰一个词吗？还可以修饰句子？
不能用副词吗？
1 unimpeded 修饰 street
意思是 畅通无阻