These cell clusters in the central part of the sinus node are all around the sinus node artery.

窦房结中心区的细胞集落，全都存在于窦房结动脉周围。

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These cell clusters in the central part of the sinus node are all around the sinus node artery.

窦房结中心区的细胞集落，全都存在于窦房结动脉周围。

youdao