小編寄語：熟悉四六級閱讀理解題型的同學應該都了解，英語四六級考試閱讀理解材料大多選自《時代》《衛(wèi)報》《科學美國人》等外刊。要想閱讀理解這部分拿到高分，必須在平常多閱讀，掌握新詞匯，鍛煉閱讀速度。但對于很多同學來說，如何每日在浩瀚的互聯網世界尋找合適的閱讀材料進行分析解讀是一項很耗時間的事情。為此，滬江英語每日精選《衛(wèi)報》《時代》等外刊上的文章供大家進行閱讀練習。

【今日閱讀推薦】本篇閱讀材料“保持大腦年輕化的七種方法”選自《讀者文摘》（原文標題：7 Anti-Aging Tips to Keep Your Brain Young）。如果大家覺得比較簡單，就當作泛讀材料了解了解，認識幾個新單詞或新表達方式也不錯。如果大家覺得這些材料理解上有難度，不妨當做挑戰(zhàn)自己的拔高訓練，希望大家都有進步^^

1. Move It
Quick — what’s the No. 1 thing you can do for your brain’s health? Differential calculus, you say? Chess? Chaos theory? Nope, the best brain sharpener may be … sneakers? Yup. Once they’re on your feet, you can pump up your heart rate. “The best advice I can give to keep your brain healthy and young is aerobic exercise,” says Donald Stuss, PhD, a neuropsychologist and director of the Rotman Research Institute at Baycrest Centre for Geriatric Care in Toronto.

differential calculus ?[數]微積分；微分學

chaos theory ?混沌理論

pump up ?給……打氣；加速

aerobic exercise ?有氧運動

Mark McDaniel, PhD, professor of psychology at Washington University in St. Louis, agrees, but adds, “I would suggest a combined program of aerobics and weight training. Studies show the best outcomes for those engaged in both types of exercise.”

As we age, our brain cells, called neurons, lose the tree-branch-like connections between them. These connections, or synapses, are essential to thought. Quite literally, over time, our brains lose their heft. Perhaps the most striking brain research today is the strong evidence we now have that “exercise may forestall some kinds of mental decline,” notes McDaniel. It may even restore memory. Myriad animal studies have shown that, among other brain benefits, aerobic exercise increases capillary development in the brain, meaning more blood supply, more nutrients and — a big requirement for brain health — more oxygen.

forestall ?v. 壟斷；預先阻止

mental decline ?智力下降

The preeminent exercise and brain-health researcher in humans is Arthur Kramer at the University of Illinois at Urbana-Champaign. In a dozen studies over the past few years, with titles such as “Aerobic Fitness Reduces Brain Tissue Loss in Aging Humans,” Kramer and his colleagues have proved two critical findings: Fit people have sharper brains, and people who are out of shape, but then get into shape, sharpen up their brains. This second finding is vital. There’s no question that working out makes you smarter, and it does so, Kramer notes, at all stages of life. Just as important, exercise staves off heart disease, obesity, diabetes and other maladies that increase the risk of brain problems as we age.

preeminent ?adj. 卓越的

a dozen ?一打；十二個

out of shape ?（身體）走形；變樣

sharpen up ?使……更敏銳；認真思考

stave off ?避開；延緩

2. Feed It
Another path to a better brain is through your stomach. We’ve all heard about antioxidants as cancer fighters. Eating foods that contain these molecules, which neutralize harmful free radicals, may be especially good for your brain too. Free radicals have nothing to do with Berkeley politics and everything to do with breaking down the neurons in our brains. Many colorful fruits and vegetables are packed with antioxidants, as are some beans, whole grains, nuts and spices.

neutralize ?v. 抵消；中和；使……中立

have nothing to do with 與……無關 ?

be packed with ?擠滿；塞滿；充滿

More important, though, is overall nutrition. In concert with a good workout routine, you should eat right to avoid the diseases that modern flesh is heir to. High blood pressure, diabetes, obesity and high cholesterol all make life tough on your brain, says Carol Greenwood, PhD, a geriatric research scientist at the University of Toronto.

in concert with?和…相呼應；與…合作；和…一致

flesh is heir to ?人所難免[共有]的

If your diet is heavy, then you’re probably also heavy. The same weight that burdens your legs on the stairs also burdens your brain for the witty reply or quick problem solving. The best things you can eat for your body, Greenwood notes, are also the best things you can eat for your brain. Your brain is in your body, after all. Greenwood’s recommendation is to follow the dietary guidelines from the American Diabetes Association (available at ).

3. Speed It Up
Sorry to say, our brains naturally start slowing down at the cruelly young age of 30 (yes, 30). It used to be thought that this couldn’t be helped, but a barrage of new studies show that people of any age can train their brains to be faster and, in effect, younger. “Your brain is a learning machine,” says Michael Merzenich, PhD, a neuroscientist at the University of California, San Francisco. Given the right tools, we can train our brains to act like they did when we were younger. All that’s required is dedicated practice: exercises for the mind.

a barrage of ?大量的

in effect ?實際上

Merzenich has developed a computer-based training regimen to speed up how the brain processes information (). Since much of the data we receive comes through speech, the Brain Fitness Program works with language and hearing to improve both speed and accuracy. Over the course of your training, the program starts asking you to distinguish sounds (between “dog” and “bog,” for instance) at an increasingly faster rate. It’s a bit like a tennis instructor, says Merzenich, shooting balls at you faster and faster over the course of the summer to keep you challenged. Though you may have started out slow, by Labor Day you’re pretty nimble.

nimble adj. 敏捷的；聰明的

Similarly, Nintendo was inspired by the research of a Japanese doctor to develop a handheld game called Brain Age: Train Your Brain in Minutes a Day, which has sold more than two million copies in Japan. No software out there has yet been approved by the FDA as a treatment for cognitive impairment, but an increasing number of reputable scientific studies suggest that programs like Merzenich’s could help slow down typical brain aging, or even treat dementia. The biggest finding in brain research in the last ten years is that the brain at any age is highly adaptable, or “plastic,” as neurologists put it. If you ask your brain to learn, it will learn. And it may speed up in the process.

Nintendo ?任天堂（日本電子游戲公司及其開發(fā)的電腦游戲名稱）

FDA ?（美）食品及藥物管理局（Food and Drug Administration）

cognitive impairment ?認知障礙；認知損害

brain aging 腦老化

To keep your brain young and supple, you can purchase software like Merzenich’s, or you can do one of a million new activities that challenge and excite you: playing Ping-Pong or contract bridge, doing jigsaw puzzles, learning a new language or the tango, taking accordion lessons, building a kit airplane, mastering bonsai technique, discovering the subtleties of beer-brewing and, sure, relearning differential calculus.

supple adj. 靈活的；柔軟的

jigsaw puzzles ?拼圖游戲；拼圖玩具

“Anything that closely engages your focus and is strongly rewarding,” says Merzenich, will kick your brain into learning mode and necessarily notch it up. For his part, Merzenich, 64, has “4,000 hobbies,” including a wood shop and a vineyard.?

notch up ?完成