没没无闻 unknown
Explanation
指没有什么名声，不为人所知。
It means without fame or recognition.
Origin Story
从前，在一个偏远的小山村里，住着一位名叫李白的年轻木匠。他心灵手巧，制作的木器精美绝伦，深受村民喜爱。然而，李白为人谦逊，从不夸耀自己的技艺，日复一日地默默耕耘，他的名字在村外鲜为人知。有一天，一位著名的工匠大师路过小山村，无意中看到了李白制作的木器，惊叹不已。大师立即找到了李白，并邀请他前往京城，参与皇宫的建造工程。李白虽然内心激动，但他仍旧保持着谦逊的态度。在京城，李白的技艺得到了充分的发挥，他参与设计和建造了多座宏伟的宫殿，他的名字也渐渐传遍了整个王朝。然而，李白依然保持着朴实的生活作风，从不追求名利。他为人们制作了无数精美的木器，给人们带来了快乐，他的名字也因此永远地刻在了历史的丰碑上。
Once upon a time, in a remote mountain village, lived a young carpenter named Li Bai. He was skillful, and the wooden utensils he made were exquisite, deeply loved by the villagers. However, Li Bai was humble and never boasted about his skills, working diligently day after day, his name remained little known outside the village. One day, a famous master craftsman passed through the mountain village and accidentally saw the wooden utensils made by Li Bai, and he was amazed. The master immediately found Li Bai and invited him to the capital to participate in the construction of the imperial palace. Although Li Bai was excited, he remained humble. In the capital, Li Bai's skills were fully utilized, and he participated in the design and construction of many magnificent palaces, and his name gradually spread throughout the dynasty. However, Li Bai still maintained a simple lifestyle and never pursued fame or fortune. He made countless exquisite wooden utensils for the people, bringing joy to people, and his name was therefore forever engraved on the historical monument.
Usage
通常用于形容一个人默默无闻，没有名气，多用于褒义。
Usually used to describe a person who is unknown and without fame, often in a positive sense.
Examples
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他一生默默无闻，直到去世也没有人知道他的名字。
tā yīshēng mòmò wúwén, zhìdào qùshì yě méiyǒu rén zhīdào tā de míngzi
He lived his life in obscurity, and no one knew his name until his death.
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这位科学家多年来潜心研究，默默无闻地为国家做出了巨大贡献。
zhè wèi kēxuéjiā duō nián lái qiánxīn yánjiū, mòmò wúwén de wèi guójiā zuò chū le jùdà gòngxiàn
For many years, this scientist devoted himself to his research and made a great contribution to the country without fame.