在线英语听力室

美国科学60秒 SSS 2012-11-14

时间：2013-06-20 07:47:24

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（单词翻译）

 Imagine if you could focus your nose the way you focus your eyes. Scientists now believe that animals with a highly developed sense of smell like rats and dogs, do just that. Similar to the way we taste sweet, salty sour and bitter on different parts of the tongue, animals detect various smells in different parts of the nose. Researchers at the University of Chicago hypothesized that rats by changing the way air flows across the insides of the nostrils1 could direct the scent2 that nasal region where could best be tested. Turns out they were right. When presented the different *ders , rats actually change the way they sniffed4. For example, long slow sniffes. For hard to detect scents5.Or short fast ones for easy ones.  Rats even sniff3 differently while learning a new scent than when the smell was familiar. The study is in the journal of NeuroScience. 

 
The researchers say the finding shows that there is more to a good sense of smell than originally thought. A sensitive nose is important, but so as how you use it. 

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1 nostrils 23a65b62ec4d8a35d85125cdb1b4410e     
鼻孔( nostril的名词复数 )
参考例句：
  • Her nostrils flared with anger. 她气得两个鼻孔都鼓了起来。
  • The horse dilated its nostrils. 马张大鼻孔。
2 scent WThzs     
n.气味，香味，香水，线索，嗅觉；v.嗅，发觉
参考例句：
  • The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
  • The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。
3 sniff PF7zs     
vi.嗅…味道；抽鼻涕；对嗤之以鼻，蔑视
参考例句：
  • The police used dogs to sniff out the criminals in their hiding - place.警察使用警犬查出了罪犯的藏身地点。
  • When Munchie meets a dog on the beach, they sniff each other for a while.当麦奇在海滩上碰到另一条狗的时候，他们会彼此嗅一会儿。
4 sniffed ccb6bd83c4e9592715e6230a90f76b72     
v.以鼻吸气，嗅，闻( sniff的过去式和过去分词 )；抽鼻子（尤指哭泣、患感冒等时出声地用鼻子吸气）；抱怨，不以为然地说
参考例句：
  • When Jenney had stopped crying she sniffed and dried her eyes. 珍妮停止了哭泣，吸了吸鼻子，擦干了眼泪。 来自《简明英汉词典》
  • The dog sniffed suspiciously at the stranger. 狗疑惑地嗅着那个陌生人。 来自《简明英汉词典》
5 scents 9d41e056b814c700bf06c9870b09a332     
n.香水( scent的名词复数 )；气味；（动物的）臭迹；（尤指狗的）嗅觉
参考例句：
  • The air was fragrant with scents from the sea and the hills. 空气中荡漾着山和海的芬芳气息。
  • The winds came down with scents of the grass and wild flowers. 微风送来阵阵青草和野花的香气。 来自《简明英汉词典》

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