两国间的贸易摩擦是由贸易保护主义者引起的。
Trade frictions between the two countries had been caused by trade protectionists.
改善交流会带来更多的贸易和合同，但也会增加社会群体之间的摩擦。
Improving communications brought more trade and contract, but also more friction between social groups.
改善交流会带来更多的贸易和合同，但也会增加社会群体之间的摩擦。
Improving communications brought more trade and contract, but also more friction between social groups.
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