参考答案：

Our ancestors always regarded the spirit of maintaining independence as the foundation of a nation. As one of the cradles of human civilization, China has all along maintained its cultural tradition without letup in its history of several thousand years. In modern times, the frequent bullying and humiliation by imperialist powers once weakened China. However, after a hundred years’ struggle of the entire Chinese nation, China has stood up again as a giant. This fully testifies to the indestructible strength of this independent national spirit of the Chinese people.