上世纪五十年代,小学算术课曾教授“石斗升合”这四种农村的旧制计量单位,从此我便记住了这个说法。石、斗、升、合之间的换算是很简单的十进制:一石等于十斗,一斗等于十升,一升等于十合。读音却很复杂:如果用作计量单位,石,要读“但”音;合,得念“各”。然而,我们当年没有教读音, In the fifties of the last century, elementary school arithmetic classes taught the old units of measurement of the four kinds of rural areas that I used to remember. Stone, bucket, lift, co-conversion between is very simple decimal: a stone is equal to ten fighting, a bucket is equal to ten liters, one liter equals ten. The pronunciation is very complex: if used as a unit of measure, stone, to read “But ” sound; However, we did not teach pronunciation that year,