丘比特來來
由于膨胀冲程推力，曲轴在旋转时会发生扭转振动。当这些气缸给曲轴推力后，曲轴旋转同时推力减小。曲轴的旋转产生振动，位于曲轴后端的减震器吸收掉扭转振动能量。在活塞环磨合期内，极端压力可能改变活塞环的品质。这时会导致活塞环过热，气缸壁也会损坏，出现裂纹，这种情形为划伤。新活塞环涂有多孔性材料，如石墨，磷，或钼。这些材料会吸收油，以最大限度地防止划伤。当活塞环磨合时，这些涂料损耗掉。一些活塞环镀有铬，镀铬环更抗磨损，同时工艺精密，活塞环能够更快磨合。经常看父亲修车，对发动机内部构造与原理多少知道些。勉强翻译了一下，那些专业词汇让人头疼。很是查了一番资料，也没找到有用的。the crankshaft output是什么部件，曲轴前端？慎重地落下一句。The twisting and unwinding是什么运动？scuffing专业说法是什么？如果把这些解决了就好了。
寻找梦想之旅
Nowadays, with the fast development of economy of the world, many cities become bigger and bigger and many modern cities are appearing. Thus, we face the complex problem: Urbanization. Urbanization has been a subject of heated discussion for a long time. Some people are in favor, while others are opposed. In my opinion, urbanization benefits human beings rather than do harm to them. Two reasons may account for my conclusion. Firstly, urbanization enriches our life. We can imagine what will happen without convenient traffic system, without big department stores, without KTVs and many other entertainments? To some extent, it is impossible for human beings to live in this world. Urbanization make it possible for us to enjoy our life more than before, Also,urbanization quicken the pace of science, especially in the communication field, in the early time, if we want to connect with our family members or friends, the only way we can choose is writing letters. But urbanization changed this situation, we can talk with the friends in the foreign countries with our any difficulties through the Internet, we gain whatever information we need on the internet. These conveniences are brought by the urbanization. Secondly, urbanization also raise our country economy. As we all know, the policy of Reform and Opening give our country a golden opportunity to develop our economy, we have a direct feeling about the dramatic increasing of our living standard, many productions that we cannot afford in the past time can be owned in today. This phenomenon proves that urbanization benefits our life basically. With the fast step of urbanization, many job opportunities are supplied in the occupation market which make many rural migrant workers get a solid work in the urban area. They also contribute to the economic development in the urban area. These prosperities are definitely brought by the urbanization. I live in Shanghai, and it is a typical big city in China. I found that we also have many negative sides of urbanization. For instance, we can talk to the friends thousands miles away, but we don’t know our neighbours in the high-rises; many migrant workers do not enjoy the same profits and rights as the permanent unban residents and this will make their living without and insurance system. But we don’t need to be so pessimistic of the situation at hand. It is evident that the advantages of urbanization outweigh the disadvantages. What we should do is to remain the positive side , meanwhile to conquer the negative side. Our government will also introduce many effective policies to narrow this contradictory. So we have enough reasons to believe the situation will become better and better so that we can reach our aim ”better city, better life ” ! There is no doubt that we prefer to live in the city. The reason is that we enjoy our life to the fullest. What kind of city life do we need? We aspire for a better life in a better city.The better city life means living in the harmonious society with congenial atmosphere and unique cultural flavors; the better city life means sitting in a bar listening to the beautiful music and communicating with family members and friends over a cup of gourmet coffee giving out a fascinating and pleasing fragrance after a day of hard work. It can also be walking in a quiet park, or appreciating a fantastic view with neon lights lighting up the night of the city.How shall we savor the better city life?We need to slow down the pace of life.It is true that we often forget our true selves in the busy pursuit of living; it is a pity that we do not know who we are anymore. We are just like a bird which forgets its own danger of being a prey of another in pursuit of a mantis. We just lose ourselves. There are some people who we think are happy, who appear to be themselves, but they are actually not the way it seems. There are some people who we think are miserable, and it seems to us that they are not themselves, in fact, they are.A true self can not be seen by others, a true self lies in his mind. A person, who has his confidence, who has an earned pride and a genuine esteem, will be happy, and will be himself. Only when he is happy, can he do his best to achieve his values, to achieve his true self, and at last can he be a successful man. To live a simple life filled with confidence is the secret to be one true self.The better city life belongs to a person who has a true self; the better city life belongs to a rational man, the man who desires nothing but rational goals, seeks nothing but rational values, and finds his joy in nothing but in his rational actions. What I care about is how to find a true self, how to make this true self better, and how to finally mold it perfect. What I care about is how this true self lives the better city life.This is our goal, our direction, our mission: better city, better life, for a better self!
叮叮猫儿要飞
百度文库上很多机械词汇，找些适合的下载下来背背就好。下面随便列举了一些： 机械工具 spanner 扳子 (美作:wrench) double-ended spanner 双头扳子 adjustable spanner, monkey wrench 活扳子,活络扳手 半自动滚刀磨床 semi-automatic hob grinder 半自动化 semi-automation; semi-automatic 扳手 wrench 备件 spare parts 边刨床 side planer 变速箱 transmission gear 柄轴 arbor 部件 units; assembly parts 插床 slotting machine 拆卸 to disassemble 超高速内圆磨床 ultra-high-speed internal grinder 车床 lathe; turning lathe 车刀 lathe tool 车轮车床 car wheel lathe 车削 turning 车 box spanner 管钳子 (美作:socket wrench) calipers 卡规 pincers, tongs 夹钳 shears 剪子 hacksaw 钢锯 wire cutters 剪线钳 multipurpose pliers, universal pliers 万能手钳 adjustable pliers 可调手钳 punch 冲子 drill 钻 chuck 卡盘 scraper 三角刮刀 reamer 扩孔钻 calliper gauge 孔径规 rivet 铆钉 nut 螺母 locknut 自锁螺母,防松螺母 bolt 螺栓 pin, peg, dowel 销钉 washer 垫圈 staple U形钉 oil can 油壶 jack 工作服 grease gun 注油枪 机械加工 抛光 polishing 安装 to assemble 衬套 bushing 半机械化 semi-mechanization; semi-mechanized 轴 axle 金属切削 metal cutting 机床 machine tool 金属工艺学 technology of metals 刀具 cutter 摩擦 friction 联结 link 传动 drive/transmission 轴 shaft 弹性 elasticity 频率特性 frequency characteristic 误差 error 响应 response 定位 allocation 机床夹具 jig 动力学 dynamic 运动学 kinematic 静力学 static 分析力学 analyse mechanics 拉伸 pulling 压缩 hitting 剪切 shear 扭转 twist 弯曲应力 bending stress 强度 intensity 三相交流电 three-phase AC 磁路 magnetic circles 变压器 transformer 异步电动机 asynchronous motor 几何形状 geometrical 精度 precision 正弦形的 sinusoid 交流电路 AC circuit 机械加工余量 machining allowance 变形力 deforming force 变形 deformation 应力 stress 硬度 rigidity 热处理 heat treatment 退火 anneal 正火 normalizing 脱碳 decarburization 渗碳 carburization 电路 circuit 半导体元件 semiconductor element 反馈 feedback 发生器 generator
优质英语培训问答知识库
