科技文翻译
科技英语：
1. This simple fact shows that the more of the force of friction is got rid of, the farther will the ball travel, and we are led to infer that, if all the impeding forces of gravitation and resistance could be removed, there is no reason why the ball, once in motion, should ever stop.
这一简单的事实表明，摩擦力消除的越多，球滚的就越远。由此我们可以推断，如果所有的重力阻力和摩擦阻力都消失的话，那么运动中的球为什么要停止运动就没有理由了。
2. Aluminum remained unknown until the nineteenth century, because nowhere in nature is it found free, owing to its always being combined with other elements, most commonly with oxygen, for which it has strong affinity.
直到19世纪人们才发现铝，因为在自然界中，它很少以单质的形式存在。这与其自身的活泼性有关，导致了它易于其他元素结合，尤其是与氧结合最普遍。
3. Manufacturing processes may be classified as unit production with small
quantities being made and mass production with large numbers of identical parts being produced.
制造工艺可分为单位生产和大批量生产。单位生产生产量少，大批量生产则是生产大量的相同部件。
4. 摘要：近年来浙江房地产市场因独有的火爆备受全国的关注，其价升量增的市场状况被称为“浙江现象”，浙江房地产开发、销售形势一片大好也麻痹了相当一部分人的风险意识。本论文在对1983年—1993年美国洛杉矶、波士顿住宅价格出现大幅度波动背景比较分析的基础上，详细分析了浙江住宅业当前面临的六大风险，指出政府应提前做好风险控制和化解工作，保持住宅业与社会经济协调发展，以减少住宅业大幅度波动给宏观经济带来的负面影响。
Abstract: Recently, the nation has concentrated on the brisk real estate market of Zhejiang Province, which, moreover, is named after “Zhejiang Phenomena” for its rising prices and increasing supplies. At the same time, the friendly circumstance of the exploitation and marketing of real estate in Zhejiang make a considerable number of people unconscious of the potential risks veiled under the good
phenomenon. Based on the dialectical analysis of the backgrounds of fluctuating prices of dwellings in Los Angeles and Boston, United States, from 1983 to 1993, this thesis deals with six risks which exist in real estate market of Zhejiang , and points out that in order to reduce the negative effect of fluctuating dwelling market on macro-economy, the local government should take measures to control or remove the risks in advance, and make estate industry and social economy well coordinated in development.