| 单词 | extinct relative | 
| 释义 | extinct relative In the next horizon we find the stromatoporoids, extinct relatives of sponges.  Smithsonian  A study of the energy needs of living molluscs and extinct relatives concluded that laziness may ensure the survival of a species and individuals.  The Sun  Could their extinct relatives have been tool-users?  Times, Sunday Times  All quillworts and their extinct relatives are heterosporous.  Retrieved from Wikipedia CC BY-SA 3.0   The family comprises the red panda (the sole living representative) and its extinct relatives.  Retrieved from Wikipedia CC BY-SA 3.0    | 
	
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