不知高低

Explanation: Of speech or do things I do not know the depth of the severity. 　　Usage: Verb-object type; as the predicate attribute; describe the things I do not know the severity of speech 　　Source: Ming Feng Meng, "Awaken the common saying Dongbin Feijian cut Huanglong": "sent by the Dongbin met, sounds good, I do not know the level." 　　Examples: That mother is a housewife On Taoism, ~, Bianxiang music public egg on the case. (Ming Feng Meng "Jingshitongyan" Volume XIII) Thesaurus:  Act recklessly, guiltless interest, not knowing whether to advance or retreat, abrupt, guiltless deep, Primary calf, have an exaggerated opinion of one's abilities as one who does not know the immensity of heaven and earth, Do not know the level of, be very promising Antonym Group:  Reasonable notice, Reasonable notice of