haveno “figures” in one’s heart- not know for certain;without clear aims; be not sure about ❍ 厂长，说出来太不成话，当了这么多年的总工程师，原来家里有多少财产，完全～。(夏衍《考验》74) It may sound ridiculous,but though I’ve been the chief engineer for so many years,I didn’t really know what hidden assets we had.
心中无数
have no clear aims;not know for certain 下一步怎样，我～。I’m not sure what will happen next.