不知深浅

Explanation: Do not know how to describe the advantages and disadvantages. 　　Usage: Verb-object type; as the predicate attribute; metaphor to speak or act without sense of propriety 　　Source: Ming Shinai "Water Margin" 19 back: "Singapore swing suppression and pond water, I do not know the depth." 　　Examples: This monk ~, the three arch-villain, the magic and borne miles! (Ming Wu Cheng-en, "Journey to the West," the seventy-fourth back) 　　Results: Duck lower river; ants jump Tong 　　Postscript: Duck lower river; ants jump Tong Thesaurus:  Act recklessly, guiltless interest, not knowing whether to advance or retreat, abrupt, guiltless accident, 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