er replacing blades without need for conducting dynamic balance，therefore unit start-up duration is greatly shortened，and expense for dynamic balance is saved at the same time．
第三句是现场实践的结果。该方法应是“被证明”，故应用被动语态。“准确可靠”是形容词，可用“be proved to be⋯ ⋯ ”的结构。但“效果是令人满意的”是句子，为了使句子简洁、对称，就把“The effect is satisfied”简化为形容词“satisfied”。
第三句可译为：This method has been proved to be accurate，reliable and satisfied through field practice．
第四句是作者的补充说明。为了强调所补充的内容，可用被动语态。另外在翻译时应注意“框图”这个词的翻译。在论文的后面，作者用一些方框及连线表示优化排序的过程，故译为“block diagram”较好，而单用“diagram”则不够形象、具体。
第四句可以为：The basic block diagram of computer-based optimal sequencing and the basic principle of small torque balance are also described in this paper．
经综合，这篇摘要的英文译文为：
This paper presents that the movable blades can be erected under the guidance of computer-based optimal blade sequencing and a new torque balancing technology in the process of replacing blades on steam turbine. This method ensures small variation of original vibration level of the unit after replacing blades without need for conducting dynamic balance，therefore unit start-up duration is greatly shortened and expense for dynamic balance is saved at the same time．This method has been proved to be accurate，reliable and satisfied through field practice．The basic block diagram of computer-based optimal sequencing and the basic principle of small torque balance are also described in this paper．
3 结 语
        一篇好的论文摘能使读者快速而准确地了解论文的基本内容，确定该论文是否与读者的兴趣或研究内容有关，决定是否需要阅读全文。科技论文的英文摘要虽然很短，但要写出和翻译出一篇好的科技论文英文文摘也要经过一番努力，仔细斟酌。希望本文能为其他编辑及作者在英文文摘的编写和翻译方面提供一定的帮助。

来源：张健  西北电力试验研究院

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