| 释义 |
国际公制guójì gōngzhì一种计量制度,创始于法国,1875年十七个国家的代表在法国巴黎开会议定为国际通用的计量制度。长度的主单位是米,一米等于通过巴黎的子午线的四千万分之一。标准米尺用铂铱合金制成,断面为X形,在0℃时标准米尺上两端所刻的线之间的距离为一米。质量的主单位是公斤,标准公斤的砝码是用铂铱合金制成的圆柱体,在纬度45°的海平面上的重量为一公斤。容量的主单位是升,一升等于一公斤纯水在标准大气压下4℃(密度最大)时的体积。{metric system; measuring system originating in France in 1875, when representatives from 17 countries had a conference in Paris and established the system by agreement for use throughout the world. The metre as a basic unit of length equals one 40 millionth of the meridian going through Paris; the standard ruler for the metre is made of an alloy of platinum and iridium with an X-shaped cross section, and at 0℃ the length is one metre between the end marks on the ruler. Standard weight for the kilogramme as a basic unit of mass is a cylinder made of an alloy of platinum and iridium that is one kilogramme at sea level at 45°latitude. The litre is the basic unit of capacity; one litre is equal to the cubage of one kilogramme of water in standard atmosphere and at 4℃ (at which water has the highest density);}也叫also米制{mǐzhì};简称{abbr.}公制{gōngzhì}。 |