1·Last night, under a heavy snowfall.
昨天晚上，下了一场大雪。
2·A heavy snowfall block the main road.
一次严重的降雪阻塞了主要公路。
3·A heavy snowfall blocks the main road.
一次严重的降雪阻塞了主要公路。
4·The heavy snowfall swept snow in the city.
大雪席卷了整座城市。
5·All flights are delayed by a heavy snowfall.
所有的飞机都被大雪延误了。
6·All roads were blocked by the heavy snowfall.
所有的道路被大雪堵塞了。
7·Shanghai has had her first heavy snowfall today.
今天上海迎来了入冬来最大的降雪。
8·Some villages have been isolated by the heavy snowfall.
由于大雪，一些村子与外界隔绝了。
9·Several villages have Been isolated By the heavy snowfall.
好几个村庄因大雪与外界隔绝。
10·My train was delayed for two hours because of a heavy snowfall.
因为下大雪，我坐的火车延误了两个小时。