而之所以研究人员在实验中使用血浆，是因为血细胞较大，无法通过血脑壁障进入大脑。
The researchers used plasma because blood cells are actually too large to travel through the blood-brain barrier into the brain.
而之所以研究人员在实验中使用血浆，是因为血细胞较大，无法通过血脑壁障进入大脑。
The researchers used plasma because blood cells are actually too large to travel through the blood-brain barrier into the brain.
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