因为狗的嗅觉神经密布在鼻粘膜上，所占面积为人的4倍，对气味的敏感度高于

因为狗的嗅觉神经密布在鼻粘膜上，所占面积为人的4倍，对气味的敏感度高于人类40倍以上。

結果 (英文) 1:

Because dog covered with olfactory neurons in the nasal Mucosa, the area of 4 times times the people, sensitive to smell than humans more than 40 times.

結果 (英文) 2:

Because the dog's olfactory nerve clouds on the nasal mucosa, the area occupied by man four times higher sensitivity to smell 40 times more than humans.

結果 (英文) 3:

Because the dog's olfactory nerves in the nasal mucosa, the area is 4 times the size of the smell is higher than 40 times the sensitivity of human.