纸上谈兵

纸上谈兵：zhǐshàngtánbīng基本解释：[armchairstrategy;engageinidletheorizing;fightonlyonpaper]比喻夸夸其谈,不切实际。也比喻只是空谈,不能成为现实●详细解释：据《史记·廉颇蔺相如列传》载：战国时赵国名将赵奢之子赵括，少时学兵法，...