Itisclearthatthedoghasamuchgreaterproportionofitsbraindevotedtosmellthanisthecasewithhumans.狗的大脑致力于嗅觉的比例要远超过人类.这句话中的is充当什么成分啊,没有看懂,读起来总觉得很奇怪,

Question

It is clear that the dog has a much greater proportion of its brain devoted to smell than is the case with humans.狗的大脑致力于嗅觉的比例要远超过人类.这句话中的is充当什么成分啊,没有看懂,读起来总觉得很奇怪,希望知道的朋友帮帮忙,

Answer 1

It is clear that the dog has a much greater proportion of its brain devoted to smell than【what】 is the case with humans
省略了what
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