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近年来,由于科学技术的迅速发展,产生了大量彼此相关联的科学技术领域,加之工业生产大规模地规格化、自动化和经济文化交流日益频繁。都迫切要求一种统一而合理的单位制。但是,长期以来,出现了多种单位制。例如,有米、公斤、秒制,还有厘米、克、秒制,米、公斤力、秒制和米、吨、秒制等。另外,还有一些不属于任何一种单位制的专用单位,如马力、毫米汞柱和克拉之类。这些单位制和单位,有的适用范围狭窄;有的物理概念不清,甚至造成与事实不符的矛盾现象;而且
In recent years, due to the rapid development of science and technology, a large number of fields of science and technology have been created that are related to each other. In addition to the large-scale standardization of industrial production, automation and economic and cultural exchanges have become increasingly frequent. We all urgently demand a unified and reasonable unit system. However, there have been many system of units for a long time. For example, there are meters, kilos, seconds, and centimeters, grams, seconds, meters, kilograms, seconds and meters, tons, seconds and so on. In addition, there are some special units that do not belong to any kind of unit system, such as horsepower, mmHg and carats. Some of these unit systems and units have narrow scope of application; some have unclear physical concepts and even cause contradictions inconsistent with the facts; and