Our noses arecapable of detecting human smells even when these are 8 to far below one part in one million.Strangely , some people find that they can smell one type of flower but not another , whereas others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate particular smell receptors in the nose. These receptors are the cells which sense smells and send messages to the brain. However , it has been found that even people insensitive to a certain smell at first can suddenly become sensitive to it when exposed to it often enough.
●真題段落中有哪些閃光詞匯?
生成特定氣味接收器:generate particular smell receptors
發送信息給大腦:send messages to the brain
接觸X足夠長的時間:expose to X often enough
察覺到人的氣味:detect human smells
稀釋到遠低于百萬分之一:be diluted to far below one part in one million
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However , it has been found that even people (insensitive to a certain smell at first ) can suddenly become sensitive to it when exposed to it often enough.
The human nose is an underrated tool . Humans are often thought to be insensitive smellers compared with animals , but this is largely because , unlike animals , we stand upright . This means that our noses are limited to perceiving those smells which float through the air , missing the majority of smells which stick to surfaces . In fact , thought , we are extremely sensitive to smells , even if we do not generally realize it
●真題段落中有哪些閃光詞匯?
感覺到那些味道:perceive those smells
漂浮在空氣中:float through the air
停留在表面:stick to surfaces
被低估的工具:an underrated tool
對氣味非常敏感:be extremely sensitive to smells
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This means that our noses are limited to perceiving those smells which float through the air , missing the majority of smells which stick to surfaces .