名词
中文翻译：河流贸易
同义词：
['river trade', 'river trades']
例句：
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1.The river trade is a vital part ofthe local economy.
河流贸易是当地经济的重要组成部分。
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2. The river trade has been declining due to pollution.
由于污染，河流贸易一直在下降。
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3. The river trade is essentialfor the survival of many species.
河流贸易对于许多物种的生存至关重要。