了如指掌了 如 指 掌 了如指掌成语造句1、他是当地土生土长干部，对这里的情况了如指掌。2、他对这里的地形了如指掌。3、她老爱看些八卦杂誌，所以对许多公眾人物的私生活了如指掌，一跟她聊起来，她就如数家珍地说个没完。4、他狠喜欢翻阅汽车杂誌，...
成语名称：了如指掌：know something like the palm of one\'s hand（know as one know his ten fingers; know as well as a beggar knows h...
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