参考词典中medulla oblongata的常规释义：
基本释义
英英解释
- lower or hindmost part of the brain; continuous with spinal cord; (bulb' is an old term for medulla oblongata)
[同]
bulb, medulla, medulla oblongata
[例]
- the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning
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