中文摘要：

从跨时贸易的视角来看，贸易顺差、逆差的转换是一国跨时贸易模式变化的结果。当期生产能力强、未来生产能力弱时，一国跨时贸易的模式是出口当期产品，进口未来产品，贸易出现顺差；当期生产能力弱、未来生产能力强时，一国跨时贸易的模式是进口当期产品，出口未来产品，贸易出现逆差。跨时贸易模式主要受跨时比较优势的影响，跨时比较优势的变化与一国的技术优势、经济发展阶段、劳动力成本、国际分工地位以及产业结构的演变密不可分。各国贸易失衡的演进历吏与跨时贸易理论相符。

英文摘要：

From intertemporal trade perspective, the conversion of trade surplus or deficit is the result of intertemporal trade model changing for a country. When current production capacity is strong and future production capacity is weak, a country will export present products and import future products, the country will have a trade surplus. When Current production capacity is weak and future production capacity is strong, a country will import present products and export future products, the country will have a trade deficit. Intertemporal trade mode is mainly affected by comparative advantage of intertemporal. The change of comparative advantage of intertemporal is related to the advantage of technology, the stage of economic development, the labor cost, the position in international division and industrial structure. Countries＇ trade imbalance evolution is content with intertemporal trade theory.