Scientists aren't exactly sure what causes the brain freeze when we eat ice cream or other super cold foods too quickly, though some believe it's the result of changed blood.

当我们过快地吃冰激凌或其他超冷食物时，科学家们并不确定是什么原因导致大脑冻结，尽管有些人认为这是血液变化的结果。

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To avoid that woozy sensation don't get up from a sitting or prone position too quickly.

为了避免这种头昏眼花的感觉，不要在坐着或躺着的时候迅速地站起来。

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To avoid that woozy sensation, don’t get up from a sitting or prone position too quickly.

为了避免这种头昏眼花的感觉，不要在坐着或躺着的时候迅速地站起来。

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It calculates what it deems to be your MPG on a trip, the ideal MPG based on whether you drove on the highway or city streets, the map of your route and whether or not you made any fuel-efficiency mistakes like braking too hard or accelerating too quickly.

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"Our major concern is that central banks in developed countries will remain too cautious, either by providing too little liquidity or trying to remove it too quickly, " the company says.

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But we don't -- we want to make sure we don't do that too quickly or we will repeat the mistakes of 1937.

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