Now, remember those tiny myofibrils that bundle up to form your muscle fibers?

现在，还记得那些微小原维捆绑形成肉维？

Thousands of tiny, parallel threads called myofibrils squish together to form muscle fibers, which are your actual muscle cells — cells with mitochondria, multiple nuclei, and a cellular membrane called a sarcolemma.

数以千计被称为原维微小平行线挤压在一起形成肉维，这就是真正肉细胞——具有线粒体、多个细胞核和称为膜细胞膜细胞。