在线词典不知轻重不懂得事情要紧不要紧。拼音bù zhī qīng zhòng解释不懂得事情要紧不要紧。近义词不明事理反义词知书达理英文释义lit. not knowing what's important (idiom); no appreciation of the gravity of things; naive; doesn't know who's who; no sense of priorities