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(单词翻译)
This is Scientific American’s 60-Second Science, I’m Christopher Intagliata. Got a minute?
Last month's salmonella outbreak got over 1,500 people sick. And one reason salmonella may be such a heavy hitter is that it actually hijacks1 our immune response for its own benefit. That's according to a study in the journal Nature
Bacteria in our gut2 gobble up things like sugars and fatty acids, which they can break down either through respiration3 or fermentation. Respiration provides a bigger energy kick. But it requires oxygen, which is sparse4 in the gut. So most bacteria go the fermentation route
Except salmonella. Because it’s adapted to use the respiration route. Not with oxygen, but via a sulfur5 compound—something most bacteria can't do
The insidious6 thing is that the sulfur compound the salmonellafeast on is a by-product7 of the attack our white blood cells launch against the invaders8. So by protecting ourselves, we're also ensuring that salmonella stay well-fed. Because a more inflamed9 gut allows salmonellabacteria to outcompete good bacteria, and explode in numbers. And the little buggers also use our attempts to expel them with vomiting10 and diarrhea. Those are both excellent ways for the bugs to get to their next victims
Thanks for minute, for Scientific American’s 60-Second Science, I’m Christopher Intagliata
1 hijacks | |
劫持( hijack的名词复数 ); 绑架; 拦路抢劫; 操纵(会议等,以推销自己的意图) | |
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2 gut | |
n.[pl.]胆量;内脏;adj.本能的;vt.取出内脏 | |
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3 respiration | |
n.呼吸作用;一次呼吸;植物光合作用 | |
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4 sparse | |
adj.稀疏的,稀稀落落的,薄的 | |
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5 sulfur | |
n.硫,硫磺(=sulphur) | |
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6 insidious | |
adj.阴险的,隐匿的,暗中为害的,(疾病)不知不觉之间加剧 | |
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7 by-product | |
n.副产品,附带产生的结果 | |
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8 invaders | |
入侵者,侵略者,侵入物( invader的名词复数 ) | |
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9 inflamed | |
adj.发炎的,红肿的v.(使)变红,发怒,过热( inflame的过去式和过去分词 ) | |
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10 vomiting | |
吐 | |
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