The fact of long and deep sleep will save you from memory loss.

事实上，长且深的睡眠能够防止记忆力的丧失。

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But for the tens of millions suffering from memory loss.

但对于数以百万计的记忆丧失的痛苦。

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Most common in the elderly, it usually begins with short-term-memory loss once thought a normal result of aging but now known to result from Alzheimer disease.

最常见于老年人，通常最初的症状是短期记忆丧失，大家曾经以为是年老的正常现象，但现在才知道是肇因于阿滋海默症。

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