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6. Elasticity is defined as the tendency of an object to return to its original state after being deformed. / By elasticity is meant the tendency ….

7. An isosceles triangle is a triangle/ one having two equal sides/having two sides equal in length/with two sides equal in length. 8. An electron is a particle with a mass of 9.107×10– 18 gram. 9. The S/N ratio is defined as the ratio of signal to noise. 10. A laboratory is a place where experiments are made. II、

1. This paper discusses some of the problems facing/concerning/connected with the nonsinusoidal electromagnetic wave radiation. At present, This system is low in efficiency, not high enough in signal fidelity, and not so good in directivity so that its applications/the areas for applications are limited.

2. The wavelet theory has so unique an advantage that it has found wide applications in many fields of engineering. Since this is the development and improvement of the Fourier analysis, it can, in principle, be used [A development and improvement of the Fourier analysis, this theory can, in principle, be used] where the traditional Fourier analysis is applicable. What is more, better results may be obtained on account of the fact that this theory overcomes the shortcomings of the Fourier analysis. III、

1. A single process is enough for us/one to obtain a satisfactory/satisfying result.

2. This method imposes few limitations on the kinds of engineering drawings.

3. Because of the great difference in characteristic between these symbols, they are processed in different ways.

4. For these reasons, it is desirable for a computer to separate the text from the image.

5. The wavelet transform is well adapted to characterizing transient phenomena.

6. These variations are so small that they can be neglected/so small as to be neglected.

7. This is beneficial not only to distinguishing signal terms from each other, but also to reducing cross terms.

8. Is it possible for us to construct an LFM signal? IV、

In recent years, great progress has been made in optical character reading

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technology, in which the image to be recognized may be mixed with a text, a graph, or a gray picture. The original binary image usually contains more than one kind of information symbol.

In this paper the text/graphics seapartion problem in the recognition of binary drawings has been discussed. By engineering drawing we mean a mechanical drawing, a geographic map, a program chart, etc. Conventional research work on text/graphics separation is described in literature [1]-[7]. The text should be printed, and it should seldom touch graphics. It is preferably written vertically or horizontally, not in any other direction. The text should not contain any Chinese characters. These assumptions limit the applications greatly/a great deal/a lot. The interactive modification will have to be made, which is labor-intensive and time-consuming.

主要参考书目

1．秦荻辉：“科技英语写作教程”，西安电子科技大学出版社，2001年2

月

2．孙娴糅：“谈谈写作英语科技论文”，科学出版社，1979年8月 3．王佩纶、邹长征：“科技英语写作基础，”东南大学出版社，1989年12

月

4．李开洋：“科技英文文摘写作，”学术书刊出版社，1989年11月 5．杨自辰、杨大成：“科技英语写作，”国防工业出版社，1991年10月 6．陈忠华：“科技英语教学的理论与实践，”河北科学技术出版社，1990

年11月

7．袁道之、索金海、忻榕：“科技英语写作指南，”电子工业出版社，1988

年10月

8．俞天民：“科技英语写作，”高等教育出版社，1983年7月 9．约翰·斯韦尔斯[英国]（王弘宝译）：“Writing Scientific English (科技英

语写作技巧),”陕西人民出版社，1987年5月

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