The Tang dynasty, which began in 618 and ended in 907, is generally regarded as the most prosperous period in Chinese history. After three hundred years of development, the Tang Dynasty has become the most prosperous power around the world. Its capital Chang’ an was the largest city in the world at that time. During this period, economy developed, commerce thrived, social order was stable, and even the border was open to the outside. Wealth increased due to urbanization, art and literature also flourished. Li Bai and Du Fu are poets who are renowned for their simple and natural writing style. Their poems touched the hearts of scholars and ordinary people; even today, many of their poems are still widely read and recited by children and adults.
is regarded as…：把……視為，認為……是
was the largest city in the world
economy developed, commerce thrived, social order was stable
are renowned for：因……而聞名
秦朝是中國歷史上第一個統一的、多民族的、中央集權的、封建王朝(feudal dynasty)。盡管秦朝只持續了15年，但是它在中國歷史上扮演著重要角色，對后續朝代產生了重大影響。為了鞏固國家統一，維持秦朝永傳萬代，秦始皇在政治、經濟、軍事和文化上進行了很多改革。政治上，他宣布自己就是這個國家的皇帝，手握重權。經濟上，他統一了度量衡(weights and measures)和貨幣。另外，他還統一了文字以及車輪之間的距離。世界奇跡—萬里長城也是他命令建造的。
The Qin Dynasty was the first unitary,multi-nationaland power-centralized,feudal dynasty in Chinese history.Although lasting only for 15 years,it played an important role in Chinese history and exerted a great influence on the following dynasties.Tostrengthen the unity of the nation and to perpetuate the Qin Dynasty, Emperor Qin Shi Huang carried out many reforms in politics,economy,military affairs and culture.In politics,he declared himself the emperor of the stale in possession of all major powers.In economy,he standardized weights and measures as well as money.In Addition,he standardized the written characters and the distance between two wheels.The miracle of the world,the Great Wall of China was also built under his order.
unitary,multi-nationaland power-centralized,feudal dynasty
exerted a great influence on：對……有極大地影響
strengthen the unity of the nation：鞏固國家統一
in possession of：占有，擁有
weights and measures：度量衡