过度拥挤使精神紧张。
现代城市由于人口过度膨胀而导致的住房拥挤、交通堵塞、城市环境恶化等现象使城市人们向往更富自然、生态气息的绿色空间。
Population expansion in modern cities caused the problem as the house crowding, the traffic jam, and urban environment worsening and so on.
允许一对夫妇生一个以上的孩子会增加人口过剩的危险，使我们这个已经很拥挤的社会更拥挤，而且会越来越过度地拥挤。
Allowing couples to have more than one child will increase the danger of overpopulation in our society that is already crowded and is becoming increasingly overcrowded.
允许一对夫妇生一个以上的孩子会增加人口过剩的危险，使我们这个已经很拥挤的社会更拥挤，而且会越来越过度地拥挤。
Allowing couples to have more than one child will increase the danger of overpopulation in our society that is already crowded and is becoming increasingly overcrowded.
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