a fine line
US /ə faɪn laɪn/
UK /ə faɪn laɪn/
1.
一線之隔, 微妙的界限
a subtle distinction or difference between two things that are very similar but can have very different consequences
:
•
There's a fine line between confidence and arrogance.
自信和傲慢之間有一線之隔。
•
It's a fine line between being helpful and being intrusive.
樂於助人和多管閒事之間有一線之隔。