不痛不痒 [- tònɡ bù yǎnɡ]neither painful nor itching; scratching the surface; cause no pain, nor itch; not grasping the main points; not forceful; not to the point; perfunctory; playing with words; pointless; superficial:
•¶不痛不痒的批评 superficial criticism
•¶ 对问题作不痛不痒的探讨 scratch the surface of the problem
•¶ 他在会上讲了些不痛不痒的话。 He made some perfunctory remarks at the meeting.