原型机

The air chief marshal will witness the first aircraft (prototype 4 or P4) taking off from the People's Liberation Army Air Force airbase in Chengdu.

空军司令marshal将会见证4号原型机在成都某人民解放军空军机场的起飞。

The Soviets published the concept of the Tu-144 in an article in the January 1962 issue of the magazine Technology of the Air Transport. The air ministry started development of the Tu-144 on 26 July 1963, following approval by the Council of Ministers ten days earlier.

早在1962年1月，苏联最一个叫做航空运输技术的公开出版物上提到Tu-144超音速客机的概念。1963年7月26日，航空工业部在获得苏联部长会议同意后的几天内，正式启动了Tu-144的原型机发展项目。

Let's take our toilet, that prototypical cybernetic example.

让我们以抽水马桶这个控制装置原型机为例。

As design got underway, the RLM issued a new directive to redesign the Do 335 as a multi-purpose day fighter, night-fighter, fighter-bomber, Zerstorer and reconnaissance platform, which caused a delay in production of the prototype.

正当设计工作全面展开之际，航空部又下达了新的指令，希望将Do 335研制成一种能适应各种作战要求的多用途战机上，可作为战斗轰炸型、高速侦察型等使用。这一决定造成了生产原型机的时间被延误了。

We believe the first Raptor patch was a program patch for the first YF-22 prototype designed by James Sergeant, a flight test engineer, during the demonstration/validation phase of the program.

我们确信最早的猛禽徽章是由詹姆斯军士为首架YF-22原型机设计的项目徽章，他是该项目演示/验证阶段的一名飞行测试工程人员。

The first-generation prototype is modified after the original invention patent, some shortages have been found after testing and using the washstand.

第一代原型机由原发明的创意改良而制出，经试验使用后发觉仍有些缺点，而改良后的第二代的原型机已具备商品化的优势。

This fighter aircraft prototype in 1955 the prototype initial test flight, in 1958 the go into operational service, will be two world wars later the whole world produces most one kind of airplane, at present still had four big continents the nearly 50 national air force to use the Mig -21 fighter aircraft.

该型战斗机的原型机于1955年原型机首次试飞，1958年开始装备部队，是二次世界大战以后全球生产最多的一种飞机，目前仍有四大洲的近50个国家空军在使用米格-21战斗机。

In this dissertation, on the basis of the rolling principle and kinematic analysis for the drive pairs, a new idea of the revolutionary surface envelope globoidal worm gearing with rolling friction and point engagement is proposed; the point engagement theory, the engaging features, the mechanism errors and adaptation, the engaging efficiency, and the design and machining technology are systematically studied; the prototype is manufactured and the experiment is performed, and the related theory and technology are verified.

本文在对传动副实现滚动的机理及运动学分析的基础上，提出了滚动式回转面包络点啮合环面蜗杆传动的基本构思与技术框架，并深入系统地研究了滚动式回转面包络点啮合环面蜗杆副的啮合原理、啮合特性、误差敏度及适应性、啮合效率、设计和制造方法；研制了原型机并进行了原型机实验等。

At the end, the prototype of the cylindrical surface envelope globoidal worm gearing with rolling friction and point engagement is manufactured successfully and the experiment of the prototype is performed, which shows that above-mentioned theory and technology for such mechanisms are correct and feasible, and also shows that the performances for such mechanisms are largely better than other worm gearings.

最后，论文通过滚动式圆柱面包络点啮合环面蜗杆传动原型机的研制和原型机实验，验证了滚动式回转面包络点啮合环面蜗杆传动理论的正确性和技术方案的可行性，同时也进一步验证了滚动式回转面包络点啮合环面蜗杆传动优良的特性并揭示了其良好的产业开发前景。

Four prototypes of Kaveri engine and two prototypes of Kabini engine have been assembled and are undergoing extensive ground testing.

四台卡佛里发动机的原型机和两台卡本尼发动机的原型机已经被装配好并将经历广泛的地面试车

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。