central nervous system (中樞神經系統)

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gray matter (灰質)

white matter (白質)

medulla (髓質)

plural form of medulla：me​dul​las or me​dul​lae

central nerve (中樞神經)

nervous system (神經系統)

peripheral nerve (周邊神經)

central nervous system (中樞神經系統)

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