一目了然 Clear at a glance
Explanation
一目了然的意思就是指：一眼就能看明白，非常清楚明白。
一目了然 means that it is clear at a glance. It is very clear and understandable.
Origin Story
有一位老先生，他是一位著名的书法家，他有一幅作品被收藏在博物馆里。有一天，一位年轻的书法爱好者来到博物馆参观，他看到了老先生的这幅作品，不禁赞叹道：“真是好字！真是好字！这字写得真是漂亮！”旁边的一位老馆长，看着年轻人的神情，笑着说：“小伙子，你看这字，一目了然吧？这是我多年的收藏，真是难得一见啊！”年轻的书法爱好者点点头，说：“是啊，这字写的真是漂亮，真是让人一眼就能看懂。”老馆长说：“这字写得好的地方，一目了然。但是，这字写得好的地方，也不仅仅是写得漂亮，更是体现了这位老先生的书法功底。”
An old man, a famous calligrapher, had a work that was displayed in a museum. One day, a young calligraphy enthusiast came to visit the museum. He saw the work of the old man and exclaimed admiringly: “What beautiful writing! What beautiful writing! This writing is truly beautifully written!” An old museum curator, seeing the young man's reaction, smiled and said: “Young man, look at this writing, isn't it clear and obvious? This is my long-time collection, truly a rare piece!” The young calligraphy enthusiast nodded and said: “Yes, this writing is really beautifully written, it's easy to understand at a glance.” The curator said: “The beauty of this writing is obvious. But the beauty of this writing is not just about being beautifully written, but it also reflects the calligraphy skills of this old man.
Usage
“一目了然” 通常用来形容事物清晰、明白，让人一眼就能看懂。
“一目了然” is often used to describe something that is clear and understandable, so that you can understand it at a glance.
Examples
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这道题很简单，一目了然。
zhe dao ti hen jian dan, yi mu liao ran.
This problem is very simple, it's obvious at a glance.
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这位老先生的书法功力深厚，作品一目了然。
zhe wei lao xian sheng de shu fa gong li shen hou, zuo pin yi mu liao ran.
This old man's calligraphy skills are profound, his works are clear at a glance.
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这份计划书一目了然，让人清楚地了解了项目的整体规划。
zhe fen ji hua shu yi mu liao ran, rang ren qing chu di liao jie le xiang mu de zheng ti gui hua.
This project proposal is clear at a glance, giving people a clear understanding of the overall project planning.