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密封不透风的地铁车厢，挤成沙丁鱼一样的人群，偶尔传来的汗臭味。我们或多或少总有过类似的挤地铁的经验，但是这时你不应该对这些有体味的人流露出鄙夷之色，因为实际上体味人人都有。那么，这些令人不快的气味是如何产生的呢？我们又如何才能有效地减少其产生呢？
Raise your hand if you’ve ever been on a bus or in any other cramped1 quarters next to someone who just smelled bad. On second thought, never mind.
The fact is, all mammals smell. In the wild, the odors produced by animals help them identify each other and choose healthy mates. In humans, one of the first ways newborns bond with their mothers is through their sense of smell. Studies have shown that little ones find the scent of their mother more comforting than that of any other woman, while other research shows that our individual scents are as unique as our fingerprints. The U.S. Department of Homeland Security2 is even conducting experiments to not only identify people through their odor types but also figure out when they’re lying.
如果你曾在公共汽车上或其他狭促拥挤的地方挨着某个发出异味的人，请举手。但转念一想，还是作罢吧。
实际上，所有的哺乳动物都会发出气味。在野外，动物身体散发出的气味有助于它们辨别自己的同伴，选择健康的伴侣。对人类而言，新生儿与母亲产生联系的原始方法之一便是通过嗅觉。研究表明，自己母亲的体味比其他女性的更能令婴儿宽心，同时还有其他研究表明，个人的气味跟指纹一样独一无二。美国国土安全部甚至正在进行实验，不仅想通过人的体味类型来辨别身份，而且想以此来分辨他们是否在说谎。
1. cramped: 狭窄的，拥挤的。
2. The U. S. Department of Homeland Security: 美国国土安全局。2002年，于小布什任期期间正式成立，主要职责是保卫国土安全及相关事务，使美国能够更加协调和有效地对付恐怖袭击威胁。
Raise your hand if you’ve ever been on a bus or in any other cramped1 quarters next to someone who just smelled bad. On second thought, never mind.
The fact is, all mammals smell. In the wild, the odors produced by animals help them identify each other and choose healthy mates. In humans, one of the first ways newborns bond with their mothers is through their sense of smell. Studies have shown that little ones find the scent of their mother more comforting than that of any other woman, while other research shows that our individual scents are as unique as our fingerprints. The U.S. Department of Homeland Security2 is even conducting experiments to not only identify people through their odor types but also figure out when they’re lying.
如果你曾在公共汽车上或其他狭促拥挤的地方挨着某个发出异味的人，请举手。但转念一想，还是作罢吧。
实际上，所有的哺乳动物都会发出气味。在野外，动物身体散发出的气味有助于它们辨别自己的同伴，选择健康的伴侣。对人类而言，新生儿与母亲产生联系的原始方法之一便是通过嗅觉。研究表明，自己母亲的体味比其他女性的更能令婴儿宽心，同时还有其他研究表明，个人的气味跟指纹一样独一无二。美国国土安全部甚至正在进行实验，不仅想通过人的体味类型来辨别身份，而且想以此来分辨他们是否在说谎。
1. cramped: 狭窄的，拥挤的。
2. The U. S. Department of Homeland Security: 美国国土安全局。2002年，于小布什任期期间正式成立，主要职责是保卫国土安全及相关事务，使美国能够更加协调和有效地对付恐怖袭击威胁。