英语语法分析

Mitochondrion is an important subcellular organ of cell.

线粒体是真核细胞中的一种重要的细胞器。

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。

Dendrites were swelling, in which mitochondrion and neurofilament disappeared.

树突肿胀、线粒体及神经微丝消失。