E强调的重心变了。如果原文的结论是Therefore, the blood vessel in Sandactylus is also used to dissipate heat generated from flapping their wings during flight, 那么E就是它的假设。把E的修饰成分缩去，简化一下，变成Heat can only be dissipated by blood vessel，强调的是blood vessel的用途。
再看原文的结论，Sandactylus fly by flapping their wings，强调的是Sandactylus飞行的方式。用血管做证据，从蝙蝠类推飞行方式，那么就应该假设两者的可比性。即血管在蝙蝠身上说明蝙蝠fly by flapping their wings，那么血管在Sandactylus身上也能说明Sandactylus fly by flapping their wings。
再罗嗦一点，原文类推的是飞行方式，而不是类推血管的作用。
蝙蝠： Blood vessel ＝》dissipate heat ＝》fly by flapping their wings
Sandactylus： Blood vessel ＝》 fly by flapping their wings
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发表于 2007-10-21 09:41:00
