英语语法分析

They proliferate and migrate randomly on the substratum and then align and finally form multinucleated myotubes.

他们增殖和迁移的基质上，然后随机调整，最终形成多核肌管。

Mononucleated osteoclast reached peak level at 3 days after tooth movement, while multinucleated cells reached peak level at 5 days.

其中单核破骨细胞在第3天、多核破骨细胞在第5天时达到峰值。