[练习册] TN-21-SC

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Reptiles, by drawing their body heat directly from the Sun rather than burning calories to generate it, can survive on ten percent of the nourishment that a mammal of similar size would normally require
  • rather than burning calories to generate it
  • rather than the generation of body heat by burning calories
  • and not from generating it by burning calories
  • instead of by burning calories for generating it
  • instead of body heat generated by burning calories
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