然而，流感病毒进化如此之快，以致于这种“免疫记忆”只能提供部分保护。
Flu viruses, however, evolve so fast that this "immune memory" provides only partial protection.
研究发现，这种小小的紫色浆果含有大量的抗氧化剂，可以延缓大脑衰竭，保护记忆。
Studies find the tiny purple berries are loaded with valuable antioxidants that can slow brain aging and protect your memory.
首席研究员杰弗瑞·艾伦伯根说：“这项研究让我们知道睡觉不仅仅是被动的保护了记忆，而是在记忆巩固中起着积极主动的作用。”
Head researcher Dr Jeffery Ellenbogen says: "This shows us that sleep does not just passively protect memories, but rather, plays an active role in memory consolidation."
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