去年国庆长假,我们全家都回乡下老家过节。在乡下,我看到了一个奇怪的现象:已经收割了稻谷的空旷的田野里,到处是一堆堆冒烟的泥土。我好奇地问爸爸那是为什么,爸爸说:“这叫‘烧灰’,就是把泥土烧熟,然后敲碎了当做肥料,蔬菜、马铃薯等农作物可喜欢这样的肥料啦。” During the National Day holiday last year, our whole family returned to their hometown for the holidays. In the country I saw a curious phenomenon: in the open fields where rice has been harvested, there are piles of smokey soil everywhere. I asked my father curiously why, and my father said: “This is called” burning ash, “which means that the soil is cooked and then crushed as fertilizer. Crops such as vegetables and potatoes are favored by such fertilizers.”