Paraphrase the following sentences into English in at least three forms: 1.中国是社会主义国家,它的发展不会对其他国家构成威胁
① As a socialist country, the development of China will constitute no threat to other countries
② The socialist nature makes it impossible for China, even when developed, to pose any threat to others
③China will not be a threat to other countries when it becomes developed itself, because it is a socialist country
2.我今天准备的题目是:美国的外交政策对中美关系的影响
①My topic/the title of my presentation today is the impact of American foreign policies on Sino-US relationship
② Today I am going to talk about the implication of American foreign policies on Sino-US relationship
③Today I am going to discuss how the American foreign policies influence Sino-US relationship
3.直到 15 世纪以前,中国的科学技术在世界上保持了上千年的领先地位