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Dorn and Soffos, who work primarily with elementary school children, suggest that in order to successfully write, a student must master three interrelated skills: comprehension of ideas, expressive language and facility with mechanics.

dorn 和 soffos ，他的工作主要是小学生，建议中表示，为了成功地写，学生必须掌握三个相互关联的技能：理解的意念，表达语言和设施维修技工。

To better understand the art of dance itself, to better understand the art of dance aesthetic characteristics, master performance principle of using dance body movement to express dance language, and further enrich the creation and development of the dance art, from the four characteristics of dance which is fictile, abundant, melodious, lyricism.

为了更深的认识舞蹈艺术本身，为了更好的了解舞蹈艺术的审美特征，掌握舞蹈形体动作体现舞蹈语言的表现规律，进一步丰富舞蹈艺术的创造和发展，从舞蹈形体语言的造型性，丰富性，音乐性，抒情性四个特征着手，浅谈舞蹈形体语言的基本特征。

We can master a foreign language by the aid of a grammar and dictionary.

我们可以借助语法书和词典来掌握一门外语。

It is important for us to master a foreign language.

我们掌握一门外语是很重要的。

I think it easy for you to master a foreign language.

我认为你要掌握一门外语是很容易的。

It is important to master a foreign language.

掌握一门语言是十分重要的。

It is very important to master a foreign language.

掌握一门外语是重要的。

It is important that we master a foreign language.

我们掌握一门外语是非常重要的。

According to actual condition, a model of wall thickness of rotary kiln is established. The constant coefficients in the model, including thermal conductivity, heat transfer coefficient, Fourier coefficient and contact resistance, are closely calculated. A formula of contact resistance is draw from a great deal of data of surface and inner temperature of rotary kiln. The wall thickness of rotary kiln is simulated by MATLAB. The simulation result is transmitted from MATLAB to DELPHI through a group of interface functions compiled by VC++. The basic graphs-circle and line are analyzed by the means of the technique of Visualization in Scientific Computing and the Bresenham arithmetic, and are realized the visualization of the wall thickness. The contents of communication between master computer and slaver computer are designed and the error control technique, the idea of multi-thread and the embedded assembly language are applied to realize the temperature data transmission and graph transmission, which largely improved the speed of transmission and the reliability and stability of system.

建立了符合现场实际的回转窑壁厚数学模型；结合现场采用红外测温仪测量所得的温度数据和回转窑的实际结构数据，确定出适合该模型的定常系数(包括导热系数、换热系数、傅立叶系数、接触热阻等)，并得出与回转窑工况的相近的接触热阻公式ln=T~(0.5154)-36.7868；利用MATLAB软件仿真出回转窑壁厚，并将运算结果通过在VC++的编译环境下编译出MATLAB和DELPHI的接口函数传输到该监测系统中，实现了温度数据的转换和交换；运用科学计算可视化技术和Bresenham扫描转换算法对基本图形——圆和直线进行分析，从而实现了仿真后的壁厚数据可视化；在研究异步串行通信方式的基础上，设计了该系统上下位机功能和通信内容，并运用差错控制技术、多线程思想以及嵌入式汇编语言实现了温度数据和图形数据在上下位机之间的远程传输，提高了数据传输的速率和系统的可靠性、稳定性。

If you want to go to college, you must master this language.

如果你想上大学，你必须掌握这种语言。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。