翻译题8.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.
【答案解析】本题属于简单句。句子框架是stresses may occur because of…or problems arising from…。arising from“由…引起”，在句中作定语修饰problems。Additional social stresses不必逐字翻译，可转译成“对社会造成新的压力”。themselves指mass migration movements。因此破折号后译成“使这种流动相对容易”。