英语语法分析

To investigate the invasion ability and collagenolytic activity of human glioma cells in vitro.

目的：观察人胶质瘤细胞的体外侵袭能力及对胶原的溶解作用。

Objective To investigate the invasion ability and collagenolytic activity of human glioma cells in vitro.

目的：观察人胶质瘤细胞的体外侵袭能力及对胶原的溶解作用。