SSS 2010-09-22
时间：2018-12-24 作者：英语课 分类：Scientific American(九)月
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 hijacks 1 our immune response for its own benefit. That's according to a study in the journal Nature
Bacteria in our gut 2 gobble up things like sugars and fatty acids, which they can break down either through respiration 3 or fermentation. Respiration provides a bigger energy kick. But it requires oxygen, which is sparse 4 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 sulfur 5 compound—something most bacteria can't do
The insidious 6 thing is that the sulfur compound the salmonellafeast on is a by-product 7 of the attack our white blood cells launch against the invaders 8. So by protecting ourselves, we're also ensuring that salmonella stay well-fed. Because a more inflamed 9 gut allows salmonellabacteria to outcompete good bacteria, and explode in numbers. And the little buggers also use our attempts to expel them with vomiting 10 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
- Just as life infiltrates matter mercilessly and then hijacks it forever, cultural life hijacks biology. 正如生命无情地浸入物质并永远地将其劫持，文化生命也劫持了生物界。
- It is not always necessary to gut the fish prior to freezing.冷冻鱼之前并不总是需要先把内脏掏空。
- My immediate gut feeling was to refuse.我本能的直接反应是拒绝。
- They tried artificial respiration but it was of no avail.他们试做人工呼吸，可是无效。
- They made frequent checks on his respiration,pulse and blood.他们经常检查他的呼吸、脉搏和血液。
- The teacher's house is in the suburb where the houses are sparse.老师的家在郊区，那里稀稀拉拉有几处房子。
- The sparse vegetation will only feed a small population of animals.稀疏的植物只够喂养少量的动物。
- Sulfur emissions from steel mills become acid rain.炼钢厂排放出的硫形成了酸雨。
- Burning may produce sulfur oxides.燃烧可能会产生硫氧化物。
- That insidious man bad-mouthed me to almost everyone else.那个阴险的家伙几乎见人便说我的坏话。
- Organized crime has an insidious influence on all who come into contact with it.所有和集团犯罪有关的人都会不知不觉地受坏影响。
- Freedom is the by-product of economic surplus.自由是经济盈余的副产品。
- The raw material for the tyre is a by-product of petrol refining.制造轮胎的原材料是提炼汽油时产生的一种副产品。
- They prepared to repel the invaders. 他们准备赶走侵略军。
- The family has traced its ancestry to the Norman invaders. 这个家族将自己的世系追溯到诺曼征服者。