Scientists found increases in gray-matter density in the hippocampus—an area responsible for learning and memory.

科学家们发现，海马体的大脑灰质密度增加了，海马体是大脑中负责学习和记忆的区域。

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With fuzzy memory, I left the gray of the past.

带着模糊的记忆，我离开了灰色的过去。

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Gray matter refers to the brain tissue that controls thinking and memory.

灰质是大脑中控制思考和记忆的组织。

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Asked for dates and times of the resignation meetings, Mr Gray responded from memory, before referring to notes in front of him.

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In December, he won the Hong Kong Cup, an international showcase race with a hefty purse, for the second year in a row atop the same gray gelding, California Memory.

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