Manyanimalshaveanexcellentsenseofsmell,whichtheyuseinhunting.Ontheotherhand,theireyesightmaybepoor.Dogs,forexample,havepooreyesightandnocolorvision.Theyseeonlyshadesofgray.Butadog’ssenseofsmellisextraordinary.Thek

Question

Many animals have an excellent sense of smell,which they use inhunting.On the other hand,their eyesight may be poor.Dogs,for example,havepoor eyesight and no color vision.They see only shades of gray.But a dog’ssense of smell is extraordinary.
The kind of dog known as Alsatian has 220 million olfactory(嗅觉的) cells.Man has five million.Scientists believe that the Alsatian is one million times better than man infinding out odors.
The human sense of smell,however,is really quite good.The averagehuman being can distinguish more than 10000 different odors.全文翻译,请不要用翻译工具!

Answer 1

许多动物都有极强的嗅觉,用此来猎食.另一方面,它们的视力可能很差.例如,狗不但视力差而且不能辨别颜色（色盲）.它们只能看见模糊的灰色,但是它却总有极灵明的嗅觉.现已知的Alsatian这种狗拥有2亿2千万的嗅觉细胞,人却只有5百万个.科学家相信在室外捕猎,ALSTIAN将会比人类强一百万倍.然而,人类的嗅觉相对真的不错.平均人类在室外可以辨别超过一万种东西.