you know, or someone really, really improving in the subject, someone enjoying the subject,

或者有人真的在这门课程取得了进步，有人很喜欢这门课，

在公园相遇的老师 - SpeakingMax英语口语达人

My advice for improving your writing really has to do with... doing as much reading as you can.

我对于提高你写作能力的建议就是尽可能多阅读。

英语阅读：技巧 - SpeakingMax英语口语达人