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我国容量单位“升”的英文名词是Litre,所以用大写“L”作为它的符号,似乎是不成问题的。但是,国际计量大会曾经有过一个规定:一个单位符号如果要使用大写字母,则这个符号必须能代表某一位在与这个单位有关的领域中有杰出贡献的科学家的姓名,例如,用大写的“N”作为“力”的单位的符号,是与著名的经典力学的创始人牛顿(Newton)相联系的。因此,“升”的符号“L”也一定有一位在容量方面作出贡献的代表人物。而这位代表人物就是在容积研究方面有过重要贡献的克劳德·埃米尔·琼·巴普蒂斯特·利特尔(Cla-ude Emile Jean Baptiste Lilre)。利特尔(1716～1778年)出生于法国,1736年迁往美国科德角桑威奇市,在一家儿童玻璃用品厂当顾问。他认识当地一位名叫乔赛亚·巴雷尔的大商人。巴雷尔正在为装运一种橘子缺乏合适的定量容量而发愁。
The English terminology for the unit of capacity “L” in our country is Litre, so the capitalization of “L” as its symbol does not seem to be a problem. However, the International Metrology Convention once stipulated that if a unit symbol is to be capitalized, the symbol must be able to represent the name of a scientist who made outstanding contributions in the field related to the unit, for example, The symbol of “N ” as the unit of “force ” is associated with Newton, the founder of the famous classical mechanics. Therefore, the symbol “L ” must also have a representative in terms of capacity. And the representative is Cla-ude Emile Jean Baptiste Lilre, who made a significant contribution to volumetric research. Litter (1716 ~ 1778) was born in France, relocated to the United States in 1736 Sandwich, Cape Town, a consultant for children’s glass products factory. He met a big local businessman named Josiah Barrell. Barrell is worrying about the lack of a suitable volumetric capacity for shipping an orange.