1. But can the colossal cities of the future really function without overloading all their services to the point of collapse and destroying the environment through pollution of air and water?
    但未来的巨城真的能够正常活动，而不会使城市的一切公共设施因超负荷而崩溃、不会由于空气和水的污染而使环境受到破坏吗？

2. As conditions deteriorate, city populations would eventually collapse due to malnutrition, disease, and perhaps violence.
    由于条件的恶化，城市人口最终会因营养不良、疾病蔓延，也许还因暴力行为而锐减。

3. Pessimists believe further population growth will eventually cause a virtual collapse of public services in many cities.
    悲观主义者认为，人口的进一步增长最终将使许多城市的公共设施崩溃，

4. If explosives are used, vibrations will cause the roof of the mine to collapse.
    若是用爆破方法，震动会使矿井的顶部倒塌。

5. If explosives are used, vibrations will cause the roof of the mine to collapse.
    若是用爆破方法，震动会使矿井的顶部倒塌。

6. If explosives are used, vibrations will cause the roof of the mine to collapse.
    如果用炸药爆破，震动会引起矿顶塌落。