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Low concentrations are good for teeth, but excessive concentrations can lead to debilitating disease, such as skeletal fluorosis, which has devastated some communities.

低浓度对牙齿有益，但浓度过高则可能导致使人衰弱的疾病，比如氟骨症，一些社区因此而成为一片废墟。

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Second, how do you foresee at the beginning of the life cycle that the project currently with low risks will have excessive risks later on in the life cycle?

第二，如何在生命周期初期预见目前低风险的项目将会在生命周期的后期具有过高的风险？

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Leung said the factors driving the market are excessive liquidity, low interest rates and a weak U.S. dollar.

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With respect to fast moving consumer goods, excessive discounting (pricing too low) can effectively train consumers to look for a certain sale price and wait for that price before they buy.

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Who needs excessive leverage when prices are low?

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