求论文摘要英文翻译，不要翻译工具的，谢谢啦

Abstract
Scaling is a common and expensive problem in the marine boiler system. Today, when the world is facing the two major issues of energy conservation and environmental protection, the prevention of boiler scale has become an important topic. In line with the actual conditions of the marine auxiliary boiler, this paper discusses the forms, nature and hazards of the boiler scale. It also states the importance and necessity of scale prevention and treatment, together with explanations on the requirements for boiler water quality and related testing methods. Also, starting from the actual status of vessels, it proposes the most practical methods of boiler descaling at the moment, including mechanical and chemical ones. Later, the paper details upon the specific operations in actual work. In the last part, it depicts a picture of existing new technologies in other nations for the descaling of the marine auxiliary boiler.

Keywords: Marine auxiliary boiler, boiler scale, water quality, descaling methods

Abstract: In the system of ship boiler, scaling is a common and expensive problem. Today, energy saving and environmental protection has become the world's two major themes. The prevention of boiler scale has become an important issue. In this paper, combining the actual ship auxiliary boiler, the form, nature and hazards of boiler scale is discussed, the importance and necessity of prevention and treatment scale is explained, and the requirements and test methods of boiler water quality is clarified. Combined with the ship practice, the most practical boiler cleaning methods is put forward, including the two major categories of mechanical and chemical. The specific methods of operation in practical work is detailed described. The outlook of current abroad in ship auxiliary boiler scale prevention and treatment of new technology is made.

Keywords: ship auxiliary boiler, boiler scale, water quality, cleaning methods