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The human brain then carries on evolving steadily over thousands of years.
接下来的几千年里，人类大脑稳步地进化着。
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The brain stem is the oldest and smallest region in the evolving human brain.
脑干在进化中的脑是最古老和最小的部位。
youdao
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The brain stem is the oldest and smallest region in the evolving human brain.
脑干在进化中的脑是最古老和最小的部位。
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