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单词 nekton
释义 nekton
 —nektonic,  adj.  
 /nek"ton, -teuhn/,  n.  
 the aggregate of actively swimming aquatic organisms in a body of water, able to move independently of water currents.
 [1890-95; < G, n. use of neut. of nektós swimming (verbid of néchein to swim; see NECTOPOD)]
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