视频欣赏

【视频欣赏】

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【听力文本】

Anyone can boost their IQ—by as much as 14 points, research shows—just by following a few rules.

You Will Need

Meat, fish, or eggs
Complex carbohydrates
Dark chocolate
Small meals
Foods rich in B vitamins
Brain teasers
Aerobic exercise

Step 1: Begin the day with protein（多补充蛋白质）
Choose the right foods at the right times, like meat, fish, or eggs for breakfast. Eating protein can increase production of neurotransmitters like dopamine or norepinephrine, which are essential for alertness, high-speed calculation, and critical thinking.

Save complex carbohydrates, like whole grains and pasta, for your evening meal, when they’ll help you fall asleep.

Step 2: Eat dark chocolate（吃纯巧克力）
Enjoy between one and five ounces of dark chocolate a day. Its antioxidants increase blood flow to the brain, making learning easier, improving your memory, and helping you think faster. Choose chocolate with more than 70 percent cocoa.

Step 3: Eat small meals（少食多餐）
Eat several small meals per day rather than three big ones. Or chew each mouthful of food 30 times before swallowing. Both of these routines reduce the amount of oxygen the brain needs to digest your food, leaving more oxygen for alertness and memory.

Step 4: Eat your Bs（多吃维生素B）
Eat more foods that are high in B vitamins, like green, leafy vegetables, citrus fruits, whole-wheat bread, and beans. Studies link B vitamins with increased mental acuity.

Step 5: Switch things up（积极尝试新东西）
Exercise your brain by doing everyday things differently, like using your non-dominant hand for routine tasks. This will force your brain to form new neural pathways, increasing its power.

An excellent brain booster you can do anywhere is to count backward from 90, in threes.

Step 6: Get some exercise（多做运动）
Get more aerobic exercise, which has been shown to actually increase brain cells. Walking briskly just three hours a week helps.

Some researchers contend that your genes are responsible for 50 percent of your intelligence. The rest is impacted by what you eat and drink, how much you sleep, your stress level, and other environmental factors.

词汇讲解

【词汇讲解】

1.calculation n. 计算

如：Where (ie At what point) did I go wrong in my calculation?
我在计算中什麽地方出了差错?

My calculation is based on notional figures, since the actual figures are not yet available.
因尚无实际数字，我是根据估计的数字计算的。

2.leafy adj. 叶茂盛的，多叶的，叶状的

如：Bearing numerous leaves; leafy.
叶子茂盛的生长繁多的叶子的; 多叶的

There is a leafy forest in our hometown.
在我们的家乡有一片树叶茂密的森林。

3.neural adj. 神经的
4.aerobic 需氧的;需氧的

如：aerobic bacteria widely distributed in nature.
需氧细菌在大自然中广泛分布。

higher bacteria typically aerobic soil saprophytes.
高等细菌，典型的有氧土壤腐生菌。

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