Thus the range of research was then narrowed down, in order to focus on a more specific topic area.

研究这样的范围内，然后收窄，以专注于更具体的主题领域。

youdao

Thus the range of research was then narrowed down, in order to focus on a more specific topic area.

研究这样的范围内，然后收窄，以专注于更具体的主题领域。

youdao