People ask: Why do you sometimes high and sometimes low, sometimes strong but it is weak?

人问：你们为什么有时高有时低，有时坚固而又是薄弱呢？

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If you go to the web just type in glycemic index, you can pull up chart after chart of high and low glycemic index foods, and sometimes you get surprised by what those foods are.

如果你在网上输入血糖指数,你会得到一个又一个,关于食物血糖指数高低的图表,有时你会被列表中的那些食物吓一跳

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Sometimes they will bet too high or too low and will have to turn to the traders to get rid of the extra or close up the shortage.

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She switches from high beams to low beams, and sometimes gets stuck in between.

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Demand is high and supply is low and that can be too much sometimes.

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