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托福TPO-45 Lecture 2-3

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Wow! Does that just go for mice?

哇,这个结果只适用于老鼠吗?
Apparently not. Similar results have come from experiments on other animals from roundworms to most recently Rhesus monkeys.
显然不是。用其他动物从蛔虫到最近的猕猴所做的实验都得出了相似的结果。
Theses monkeys, two groups of them, were give all the vitamins and minerals and other nutrients they needed, except that one group got 30% fewer calories.
这些猴子被分成了两组,得到了它们所需的所有维他命和矿物质以及其他的营养物质,只不过一组少得到了30%的卡路里。
And now after 30 years or so, about an average lifetime for a monkey,
在30年左右后,也就是大约一只猴子的平均寿命,
it’s clear that the monkeys that have been on the calorie restricted diet are doing a lot better than the ones on that we consider a normal healthful diet.
很明显看到那些按照卡路里限制食谱进食的猴子比那些按照我们认为是普通的健康食谱进食的猴子活得好得多。
Like in terms of blood pressure and lots of other measures,
在血压和很多其他标准中,
the calorie-restricted monkeys are much healthier and they just look and act younger than the monkeys in the normal diet group.
卡路里限制的猴子要健康得多,而且它们比普通饮食组的猴子看起来更年轻,行为上也更年轻。
And as a group, they are living longer.
它们一整个小组活的时间都更长。
Interesting. But what’s the connection?
很有趣,但是有什么联系呢?
Oh, with the immune system?
哦,和免疫系统有什么联系吗?
Well, it’s been shown that the immune system becomes much less effective as animals age.
研究显示,随着动物变老,它们的免疫系统会变得不那么有效。
That’s true in humans too, we think those naive T-cells just get used up, I mean it is not like the body’s always making lots of new ones.
这在人类身上也是一样。我们认为那些幼稚型T细胞被耗尽了,我是说,身体不是一直都会制造很多新T型细胞的。
And over the course of a lifetime, as T-cell encounter more and more strange bacteria or whatever, the naive T-cells get turned into memory T-cells.
在一生中,随着T细胞遇到越来越多的陌生细菌或者随便其他什么细胞,幼稚型T细胞会变成记忆性T细胞。

重点单词   查看全部解释    
except [ik'sept]

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vt. 除,除外
prep. & conj.

联想记忆
effective [i'fektiv]

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adj. 有效的,有影响的

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naive [nɑ'i:v]

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adj. 天真的,幼稚的

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pressure ['preʃə]

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n. 压力,压强,压迫
v. 施压

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calorie ['kæləri]

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n. 卡,卡路里(热量单位)
=calory

 
encounter [in'kauntə]

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n. 意外的相见,遭遇
v. 遇到,偶然碰到,

 
restricted [ris'triktid]

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vt. 限制,约束 adj. 受限制的,有限的,保密的

 
bacteria [bæk'tiəriə]

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n. (复数)细菌

 
immune [i'mju:n]

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adj. 免除的,免疫的

 

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