了然于胸 liaoran yuxiong clear in one's mind

Explanation

对情况、问题等非常了解，心里很清楚。形容对某事非常了解，心里很清楚。

To have a thorough understanding of something; to know something very well.

Origin Story

话说唐朝时期，一位名叫李白的诗人，在游历山水时，常常会遇到各种各样的奇闻异事。有一次，他来到了一个偏僻的小山村，村民们听说他是一位才华横溢的大诗人，纷纷前来拜访。李白看到村民们如此热情，便欣然答应了他们的请求。他向村民们讲述了他在旅途中遇到的各种奇闻异事，村民们听得津津有味。当他讲到自己如何轻松地化解了一场冲突时，一位老人问道：“李先生，你是如何做到如此胸有成竹的呢？”李白笑了笑，说道：“我之所以能够如此应对自如，是因为我事先已经对情况了然于胸。我不仅了解事情的来龙去脉，更重要的是，我预想到了可能出现的各种情况，并提前做好了应对的准备。正因为如此，我才能在关键时刻临危不乱，从容应对。所以说，无论做任何事，只要事先做好充分的准备，了然于胸，就能做到心中有数，就能取得最终的成功。”

huashuo tangchao shiqi,yiwei mingjiao libaide shiren,zai youli shanshui shi,changchang hui yudaogangeyangde qiwen yishi.you yici,ta laidao le yige pianpi de xiaoshancun,cunminmen ting shuo ta shi yiwai caihua hengyi de dashiren,fenfen qinglai baifang.li bai kan dao cunminmen ruci reqing,bian xinran dayingle tamen de qingqiu.ta xiang cunminmen jiangshule ta zai lüchengzhong yudaode gezhong qiwen yishi,cunminmen ting de jinjin youwei.dang ta jiang dao ziji ruhe qingsongde huajiele yichang chongtu shi,yiwei laoren wandao：‘lixiansheng,nishishiruhe zuodao ruci xiong youchengzhu dene?’li bai xiaole xiaoshuo,shudao：‘wo zhi suo yi nenggou ruci yingdui ziru,shi yinwei wo shixian yijing dui qingkuang liaoran yuxiong.wo bujin liaojie shiqing de lailongqimai,geng zhongyaodeshi,wo yuyixiang le keneng chuxiande gezhong qingkuang,bing tiqian zuohaole yingduide zhunbei.zhengyinwei ruci,wo cai nengzai guanjian shike linwei buluan,congrong yingdui.suoyishuo,wulun zuo renheshi,zhiyao shixian zuohao chongfen de zhunbei,liaoran yuxiong,jiuneng zuodao xinzhongyoushu,jiuneng qude zuizhong de chenggong。’

It is said that during the Tang Dynasty, a poet named Li Bai often encountered various strange stories and events while traveling through mountains and rivers. Once, he came to a remote small mountain village, and the villagers, having heard that he was a talented poet, came to visit him in droves. Seeing the enthusiasm of the villagers, Li Bai readily agreed to their request. He told the villagers about the various strange stories and events he had encountered on his travels, and the villagers listened with great interest. When he talked about how he had easily resolved a conflict, an old man asked, "Mr. Li, how were you able to remain so calm and collected?" Li Bai smiled and said, "The reason why I was able to respond so calmly was because I had already thoroughly grasped the situation in advance. I not only understood the ins and outs of the matter, but more importantly, I had anticipated various possible scenarios and had made preparations in advance. Because of this, I was able to remain calm and composed in critical moments. Therefore, whatever you do, as long as you make sufficient preparation and have a thorough understanding of things beforehand, you can remain collected and achieve ultimate success.

Usage

用于形容对某事非常了解，心里很清楚。多用于书面语。

yongyu xingrong dui moshishufang liaojie,xinli hen qingchu.duoyongyu shumianyu.

Used to describe having a thorough understanding of something; often used in written language.

Examples

• 他作战计划了然于胸，胸有成竹。

  ta zuozhan jihua liaoran yuxiong,xiongyouchengzhu.

  He had a thorough grasp of the battle plan.

• 对公司未来的发展方向，他已经了然于胸。

  dui gongsi weilai de fazhan fangxiang,ta yijing liaoran yuxiong

  He already has a clear understanding of the future direction of the company.

Related Idioms

• 心中有数

• 胸有成竹

Opposite Idioms

• 一窍不通

• 茫然无知