心中有数[xīn zhōng yǒu shù]
词典know the score：心中有数；知道真相。
词典have a head for figures：心中有数；胸中有数。
词典have a clear idea about...：心中有数。
词典心中有数的反义词
词典have a grasp of a situation and know what to do：心中有数。
心中有数[xīn zhōng yǒu shù]
know the score; have a head for figures（指数量）; have a clear idea about... ; have a grasp of a situation and know what to do; have a pretty good idea of...; know fairly well; know what's what; know one's own mind; know what others are thinking about; know in
例：对计划执行情况心中有数
have a pretty clear idea of how the plan is being carried out