Market failure: When a market fails to operate efficiently (inefficient market). Prices do not reflect all publicly available information, and may be influenced by monopolistic practices or government regulations.

• 市场不完善:指市场不能有效率运转的情况(即不完全有效率市场)。价格无法反映公开的所有信息,并可能受垄断行为或政府控制的影响。