Aiming at this goal, a systematic investigation and study was carried out on following aspects.

围绕这一目标，本研究对以下方面进行了全面系统的考察和研究。

youdao

Aiming at this goal, a systematic investigation and study was carried out on following aspects.

围绕这一目标，本研究对以下方面进行了全面系统的考察和研究。

youdao