2015考研英语阅读动物如何感知时间_大学英语阅读

2015考研英语阅读动物如何感知时间

　　For people, the average CFF is 60 hertz . This is why the refresh-rateon a television screen is usually set at that value. Dogs have a CFF of 80Hz, which isprobably why they do not seem to like watching television. To a dog a TV programme lookslike a series of rapidly changing stills.

　　对人类来说，平均的CFF是60赫兹。这是通常设置的电视屏幕刷新率。狗狗眼睛的刷新率是80赫兹，这可能是它们不看电视的原因。对狗来说，电视节目看起来像一系列快速变化的幻灯片。

　　Having the highest possible CFF would carry biological advantages, because it would allowfaster reaction to threats and opportunities. Flies, which have a CFF of 250Hz, arenotoriously difficult to swat. A rolled up newspaper that seems to a human to be movingrapidly appears to them to be travelling through treacle.

　　有最快速的CFF会拥有生物学优势，因为这意味着面对威胁或者机会时会有更快的反应速度。苍蝇的CFF是250赫兹，很难被拍死。在人类看来迅速落下的一卷报纸在苍蝇看来就想是慢动作。

　　Mr Healy reasoned that the main constraints on an animals CFF are its size and itsmetabolic rate. Being small means signals have less far to travel in the brain. A highmetabolic rate means more energy is available to process them. A literature search,however, showed that no one had previously looked into the question.