| 单词 | porpoise | 
| 释义 | porpoise  (pɔːʳpəs  ) Word forms:  porpoises   countable noun A porpoise is a sea animal that looks like a large grey fish. Porpoises usually swim about in groups.   Acoustic devices were used to scare dolphins and porpoises away.   Image of porpoise     © Takayuki Ohama, Shutterstock | 
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