I could only take intro courses because there were no intermediate level courses available for those particular topics.

我只能选入门课程，因为这些特定主题没有中级课程可选。

youdao

I could only take intro courses because there were no intermediate level courses available for those particular topics.

我只能选入门课程，因为这些特定主题没有中级课程可选。

youdao