Nucleus centralis medialis

例句：

1. 1.The nucleus of the cellis where DNA is stored.
   细胞的核心是DNA的存储地。
2. 2. The heart'snucleus controls the rhythm of itsown beating.
   心脏的核心控制着其自身的跳动节奏。
3. 3. The nucleus of theplanet is the sun.
   行星的核心是太阳。