(a) In developed countries, international trade and technological changes have contributed to a lowering of the cost of unskilled low wage labour, particularly in those sectors exposed to international competition, thereby increasing the gap between high income earners and those on low pay;
(a) 在发达国家，国际贸易和技术革新导致低收入非技术性劳动力成本降低，尤其是在那些面临国际竞争的部门。