指挥若定指挥起来稳操胜算镇定自如。若定心中有数，从容不迫。例清君侧肃宫廷，指挥若定。——清梁启超《谭嗣同传》英be calm in directing;[查看详情]

了如指掌形容对情况极为清楚。例对他们的活动他完全了如指掌。英have sth.at one’s fingertips; know as one know his ten fingers; know like a book; know as well as a beggar knows his bag;[查看详情]

如数家珍数：点数。家珍：家藏的珍宝。如同点数家里的珍宝。比喻对所讲的事情非常熟悉。例蒙蒲清为一一说明真正是如数家珍。——郭沫若《洪波曲》英as if enumerating one's family valuables—very familliar with one's subject;[查看详情]

心中有数对于事情比较了解处理起来已有把握。英know what's what;[查看详情]

知己知彼对自己和对方都了解得很透彻。英knowing one's own situation and that of the enemy;[查看详情]

胸有成竹胸有成算。比喻作事之先已有成算在胸。例岂知皮匠胸有成竹早把火刀、火石摸在手中一敲就着。——清李绿园《岐路灯》英to have a well-thought-out plan beforehand; have a card up one's sleeves; have a contrivance ready;[查看详情]