Because of crowdedness, we had to stand outside the classroom.
因为拥挤，我们不得不站在教室外。
Concerned Americans are trying to solve the problems of noise, dirt, crime, crowdedness, and pollution in the big cities.
心怀忧虑的美国人正试图解决大城市的噪音、肮脏、犯罪、拥挤和污染问题。
Concerned Americans are trying to solve the problems of noise, dirt, crime, crowdedness, and pollution in the big cities.
心怀忧虑的美国人正试图解决大城市的噪音、肮脏、犯罪、拥挤和污染问题。
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