中譯英！！！高手來！~100分加給妳

Since ancient times Tibet is an inalienable part of China, Tibet, people of all ethnic groups is an important member of the Chinese nation. The peaceful liberation of more than 50 years, Tibet along with the prosperity of the motherland and with each passing day, step by step from darkness to light, from backwardness to progress, from poverty to wealth, from closed to open, a 20th century development of human society chapter in the history of one of the most magnificent. Tibet today, economic development, social progress, national unity, social stability, ethnic traditional culture has been a very good protection and development of broad masses of believers enjoy full freedom of religious belief, people's material and cultural living standards constantly improve, all ethnic groups People live and work in peace, prosperity and social development.如有地方翻得不好，請諒解！