借自希腊语的科学名词。来自希腊语mitos,线，丝，词源同mitre,khondrion,颗粒，软骨，词源同grind,hypochondria.用于指线粒体。

1. Only 13 of the mitochondrion's component proteins are encoded by its own DNA.

只有13种线粒体的组成蛋白质是由线粒体自己的DNA编码的.

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2. The mitochondrion is therefore a really essential part of the cell.

因此,线粒体是细胞真正重要部分.

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3. The proteins are constructed in the cell, outside the mitochondrion, just like all non - mitochondrial proteins.

蛋白质在线粒体外的细胞里制造, 正像所有的 非 线粒体蛋白质一样.

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4. The mitochondrion is a machine within the cell that does the chemistry of breathing.

线粒体是细胞内进行呼吸化学的一部机器.

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5. But nearly all of those genes are not in the mitochondrion's DNA at all!

但是,几乎所有那些基因完全不在线粒体的DNA中!

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