... 等额选举 single-candidate election 登革热 Dengue Fever 等价交换 equal-value exchange ...
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equal value exchange 等价交换
Exchange of equal value [贸易] 等价交换
exchange at equal value 等价交换
The principle of equal-value exchange, which stresses equal value in exchange, is a common law in commercial and economic activities.
等价交换原则是商品经济活动领域通行的原则，强调交换的等价性。
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