There is a fine line between showing interest in what someone is doing and interfering in it.

关心别人正在做的事情和进行干预之间存在着细微的差别。

《牛津词典》

"The bottom line question to ask is, is your forgetfulness fundamentally interfering with how you function?"

“要问的底线问题是，你的健忘是否真的根本性地妨碍了你的行动？ ”？

youdao

The bottom line question to ask is, is your forgetfulness fundamentally interfering with how you function?

要问的底线问题是，你的健忘是否真的根本性地妨碍了你的行动？

youdao

The BBC's Jonathan Beale in Washington says President Obama continues to tread a fine line in commenting on Iran - anxious not to be seen as interfering nor to fuel anti-American sentiment.

BBC: Obama says world is watching Iran

Like Szymanski, she said the line between acceptable and inappropriate use is determined by whether or not it is interfering with life, work or study and relationships.

FORBES: Facebook "Phone" Could Be One More Distraction in a World Full Of Them