mitochondrion

例句：

1. 1. Mitochondria are the powerhouses of cellular respiration.
   线粒体是细胞呼吸的发电厂。
2. 2. The mitochondria in the heart muscle are responsible for energy production.
   心脏肌肉中的线粒体负责能量生产。
3. 3. The study of mitochondria has led to new insights into the functioning of the cell.
   对线粒体的研究表明了细胞功能的新的理解。