There is no clear dividing line between what is good and what is bad.

是非之间没有明确的界限。

《牛津词典》

After repairing, no cracks, no hard points and no clear dividing line exist.

修补后铸件无裂纹、无硬点、无明显分界线。

youdao

There was, he suggested, no clear dividing line between what was acceptable and what was not.

他认为还没有明显的界限来区分哪种是可以接受的哪种是不可以的。

youdao

With no clear dividing line between the ownership, management, and participants in these markets, they are more prone to mismanagement and malpractices.

FORBES: Dark Pools: The Menace Of Rising Opacity In Financial Markets