怎么计算同期下降率简介：It snowed all night, and the small town of Pinghai was covered with a layer of snow. Fortunately, the roads were not blocked by ice, and the streets were only cleared of snow and became passable.
It snowed all night, and the small town of Pinghai was covered with a layer of snow. Fortunately, the roads were not blocked by ice, and the streets were only cleared of snow and became passable.
