Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements—themselves made relatively easy nowadays by modern means of transport.
由于人口的猛增或大量人口流动（现代交通工具使这种流动相对容易）造成的种种问题也会对社会造成新的压力。
With the population explosion in the city and decrease of land resources, using land in stereoscopic form has become a general trend all over the world.
随着城市人口的快速增长和土地资源的日趋稀缺，以立体方式利用土地，已成为世界范围的普遍趋势。
Additional social stresses may also occur because of the population explosion problems arising from mass migration movements—themselves made relatively easy nowadays by modern means of transport.
由于人口的猛增或大量人口流动（现代交通工具使大量人口流动变得相对容易）所造成的种种问题也会增加社会压力。
Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements — themselves made relatively easy nowadays by modern means of transport.
由于人口的猛增或大量人口的流动(现代交通工具使这种流动相对容易)造成的种种问题也会对社会造成新的压力。
Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements — themselves made relatively easy nowadays by modern means of transport.
由于人口的猛增或大量人口的流动(现代交通工具使这种流动相对容易)造成的种种问题也会对社会造成新的压力。
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