蓝色合用于那种交通东西?
大部分人认为自行车比其它交通东西要安全些。
Most people think bicycles are much safer than any other vehicle.
因为人口的暴增或者大量人口流动(现代交通东西使这种流动相对容易)激发的种种问题也会对社会形态造成新的压力。
Bdditional 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.
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