tā / píng / zhe / jiān / rèn / bù / bá / de / yì / lì / ， / zhōng / yú / wán / chéng / le / zhè / xiàng / yán / jiū

她凭着坚韧不拔的毅力，终于完成了这项研究。

Through sheer perseverance, she finally completed the research.