| 单词 | river dolphin | 
| 释义 | Word Frequency river dolphinany freshwater cetacean of the family Platanistidae, inhabiting rivers of North and South America and S Asia. They are smaller than marine dolphins and have a longer narrower snout  Word Frequency river dolphin(ˈrɪvə ˈdɒlfɪn) noun   another name for dolphin (sense 2)   | 
	
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