大鼠的脑中，嗅球有蚕豆那么大，兔子脑中的有你的小手指那么大，而寻血犬脑中的有拇指那么大。
It's bean-sized in a rat, about the size of your little finger in a rabbit, and the size of your thumb in a bloodhound.
大鼠的脑中，嗅球有蚕豆那么大，兔子脑中的有你的小手指那么大，而寻血犬脑中的有拇指那么大。
It's bean-sized in a rat, about the size of your little finger in a rabbit, and the size of your thumb in a bloodhound.
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