“米”这个长度单位在我们的生活中早已司空见惯,平常得不能再平常了。但是你可能不知道,“米制”居然是1789年法国大革命时期的“革命产物”。当时的法国革命政府请两位毅力惊人的天文学家分别从巴黎出发,沿两个相反的方向测量地球,计算出北极至赤道之间的长度,并且将这段长度 The unit of length “m” has long been commonplace in our life and can not usually be normal. But you may not know that “rice system” actually was the “revolutionary product” of the French Revolution of 1789. At that time, the French Revolutionary Government invited two astronomical Perseverance Perseveres respectively from Paris, measuring the Earth in two opposite directions, calculate the length of the Arctic to the equator, and this length