二十世纪即将过去。回顾以往,不觉令人感叹。新的世纪即将到来,瞻望未来,不觉令人感奋。没有矛盾就没有世界。社会是在矛盾中发展的,人类是在矛盾中进步的。对二十世纪也当作如是观。二十世纪是一个风云变幻、繁复纷纭的世纪。在这个世纪中,人类在物质和精神文化生活领域都取得了巨大的进步,然而又总是不断地遇到困难、曲折甚至灾难。人类终于实现了许多世纪积累下来的梦想,可以进入太空观察宇宙的奥秘,而在微观世界又可以进入分子甚至原子的内部 The twentieth century is about to pass. Recalling the past, I feel sigh. The new century is coming and it is exciting to look forward to the future. There is no world without contradictions. Society is developed in contradictions, and mankind is progressing in contradictions. The same is true of the twentieth century. The twentieth century is a rapidly changing and diverse century. In this century, mankind has made great strides in the fields of material and spiritual culture. However, it has constantly encountered difficulties, twists and turns and even catastrophes. Mankind has finally realized the dreams accumulated over the centuries and can enter the space to observe the mysteries of the universe and in the microcosm enter the interior of molecules and even atoms