例句：
days were short, for it was now December.
天短了，因为现在是十二月。
gray wind of December is sweeping down the overhung of the roof.
十二月的阴沉沉的风顺着房顶吹下来。
mber 31st is the end of the year.
十二月三十一号是一年的最后一天。
