Archeological evidence points to a multitude of factors, including internecine warfare, the loss of trade routes, drought, and disease.
考古上的证据有很多种，包括内战，贸易途径的消失，干旱和疾病。
channel [trade]
渠道,途径 [贸易]
Establishment of border trade district is one of efficient routes.
设立边境互市贸易区是有效途径之一。
.Seeking to resolve trade disputes;
·寻求解决贸易争端的途径；
On the Ways of Professionals Training of International Economic and Trade Major;
国际经济与贸易专业人才的培养途径
The Ways of Harmonizing Issues on Trade and Environment in WTO and MEAs;
WTO规则与MEAs环境贸易措施之协调途径
“Processing Trade” Is the Effective Ways toMeet the Challenge for Entering WTO;
“加工贸易”是应对入世挑战的有效途径
On the Reasons and the Solution to the Sino-U.S. Textile Trade Friction;
论中美纺织品贸易摩擦的原因与解决途径
Intra-industry Trade: A Way to Realize the Structure Optimizing of China's Steel Industry;
产业内贸易：我国钢铁产业结构优化的实现途径
Analysis for the Chinese Enterprises Actually Dealing with WTO Trade Relief Measures;
中国企业应对WTO贸易救济措施的有效途径
Contract Linkage to Environment to Shift Dilemma between Trade Liberalization and Environmental Protection;
环境联接合约——贸易与环境问题解决的有效途径
An In-depth Analysis of the Rapid Growth of Chinese Foreign Trade;
区域整合:对外贸易增长迅速的解决途径
Virtual Water Trade--the Effective Way to Realize Water Security;
虚拟水贸易——实现水资源安全的有效途径
The Best Way to Coordinate Trade and Environment: Internalization of Environmental Cost;
协调贸易与环境的最佳途径——环境成本内部化
The Road to Establish Competitive Trade Advantage for Developing Countries;
发展中国家在国际贸易中创建竞争优势的途径
Commercial Diplomacy: A Strategic Transition in American Trade Politics;
商务外交:美国实现贸易政治战略转变的途径
Trade Financing--Efficient Way toSolve the Middle-small Companies’ Financing Problem;
贸易融资——缓解中小企业融资难的有效途径
Intra-industry Trade: A Way to the Efficient Growth of Chinese Iron and Steel Industry;
产业内贸易:我国钢铁产业高效扩张的实现途径