The study concluded that "the mechanism of this weight loss is unknown [but] it would appear reasonable to include grapefruit in a weight reduction diet."

研究得出结论是这种减轻体重的机制还未知道，但相信包括葡萄柚等类似的减肥饮食的合理原因会浮出水面的。

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In this dark realm, at a loss and fear of the unknown, wrapped in the dark, wrapped around her remaining courage.

就存在于这片黑暗的领域里，对未知领域的茫然与恐惧透过深邃的黑暗缠绕着，包裹着，蚕食着她仅存的勇气。

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Parkinson's disease is caused by the degeneration of neurons in the midbrain. The mechanisms leading to the loss of these neurons, however, are largely unknown.

帕金森氏症是由中脑中神经细胞的退化导致的疾病。这种机制导致了这些神经的缺失，然而现金大部分机制还不清楚。

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Relinquishing personal information on a pop-up box or unknown source could lead to the loss of money or identity theft.

FORBES: Cyber Crooks See Huge Opportunity In Japan's Tragedy

Dr Eric Karran, from the charity Alzheimer's Research UK, said the exact connection between hearing loss and cognitive decline was still unknown.

BBC: Hearing loss in 'brain decline link'

Even if nothing worse happens than has already happened, the incident has already been responsible for loss of life, injury and contamination of an unknown number of people.

FORBES: Wakeup Call For GE: Mr. Immelt, Pull That Ad!