四级Rats are often associated with spreading disease rather than preventing it, but this long-tailed animal is highly sensitive Inside a rat's nose are up to 1, 000 different types of olfactory receptors whereas humans only have 100 to 200 types.
老鼠通常与疾病传播有关,而不是预防疾病,但这种长尾动物对老鼠鼻子内的气味高度敏感,有多达1000种不同类型的嗅觉受体,而人类只有100到200种。
2017年12月四级真题(第一套)阅读 Section A
四级Inside a rat's nose are up to 1,000 different types of olfactory receptors whereas humans only have 100 to 200 types.
老鼠鼻子里有多达1000种不同类型的嗅觉受体,而人类只有100到200种。
2017年12月四级真题(第一套)阅读 Section A
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