you are working a fine line

you are working a fine line you are working a fine line here You are woking a fine line here.怎么翻译? A FINE FRIENG YOU ARE You are a punch line.是什么意思 You are a hard-working student是什么意思? 问：How are you?答：A:Fine,thanks!B:Fine,thank!C:Fine,thank you! are you on line ...fine line ... tread a fine line 的意思是什么 You're workin' a fine line .为什么是"你理解能力真强"的意思? Study Bill Clinton working a rope line.