Trials of high doses of vitamin C administered therapeutically, starting after the onset of symptoms, showed no consistent effect on either duration or severity of common cold symptoms.

至于针对治疗性服用维生素C的研究则显示，在感冒症状出现后才开始服用者，对感冒持续的时间或严重程度并没有一致的结果。

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Vitamin C helps to reduce the severity and duration of colds.

维生素C有助于减少感冒的严重程度和持续时间。

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The decay rate of the C-14 sample with its long half-life should be nearly constant during the short duration of the experiment.

在一个短实验周期里，具有较长半衰期的C 14样品的衰变速率应该是一个近似常数。

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The most that can be said about these bonds is that if you (a) reach out on the maturity spectrum, (b) hold the TIPS for the full duration and (c) hold them inside a tax-deferred account like an IRA, then you will have a positive return.

FORBES: Six Ways to Inflation-Proof Your Bonds