摘要:  birthday card    生日卡 Christmas card    圣诞卡 New-Year card    贺年卡 post card   &[阅读全文]

摘要:birthday card生日卡 Christmas card圣诞卡 New-Year card贺年卡post card明信片 identity card身份证 credit card信用卡 guest card贵宾卡 preferential card优惠卡 expense card消费卡 get-well card慰问卡 record[阅读全文]

摘要:The Ricardian model focuses on comparative advantage and is perhaps the most important concept in international trade theory. In a Ricardian model, countries specialize in producing what they produce[阅读全文]