尧让天下于许由，是中国古代的一段传说故事。尧是中国古代的一位传说中的圣人，他在位时，天下太平，民风淳朴。但是尧年老体弱，无法继续治理天下，于是他开始寻找一位合适的继承人。

在寻找继承人的过程中，尧遇到了一个叫做许由的贤人。许由非常聪明睿智，深得人民的爱戴。尧便决定将天下让给许由。

许由接过天下后，非常谦虚谨慎，治理天下的政策也得到了人民的认可和支持。他非常注重教育，推崇“以德治国”，并且开办了许多学校，培养了一批批优秀的人才。他还制定了很多有利于人民的政策，使得天下更加繁荣昌盛。

尧将天下让给许由的故事，表现了尧为人民着想、推崇人才、传承文化的高尚品质，也表现了许由治国有方、以德为先的智慧和胆略。这个故事在中国历史上被广为传颂，成为了中国传统文化中重要的一部分。

英文翻译：

"Yao passing the world to Xu You" is a legendary story in ancient China. Yao was a sage in Chinese legend, and during his reign, the world was peaceful and the people were honest. However, Yao was old and weak, and could not continue to govern the world, so he began to search for a suitable successor.

During his search for a successor, Yao met a wise man named Xu You. Xu You was very intelligent and loved by the people. Yao decided to pass the world to Xu You.

After taking over the world, Xu You was very humble and cautious. His policies for governing the world were also recognized and supported by the people. He placed great emphasis on education, advocated "governing the country with virtue", and established many schools to cultivate excellent talents. He also formulated many policies that were beneficial to the people, making the world more prosperous.

The story of Yao passing the world to Xu You reflects Yao's noble qualities of considering the people, valuing talents, and passing on culture, as well as Xu You's wisdom and courage in governing the country with a proper approach and putting virtue first. This story has been widely spread in Chinese history and has become an important part of traditional Chinese culture.