1. The first snowfall ushered in the winter.
   第一场雪预示着冬天的到来。
2. Several villages have Been isolated By the heavy snowfall.
   好几个村庄因大雪与外界隔绝。
3. The average snowfall here is 10cm a year.
   这里年平均降雪量为10厘米.
4. A brief,light snowfall.
   一阵风雪一次短而小的雪
5. All flights are delayed by a heavy snowfall.
   所有的飞机都被大雪延误了。

　1个名词解释