A heavy frost lay over the road, roofs and trees.

道路、房顶和树木上都结着厚厚一层霜。

youdao

There was a heavy (ie severe) frost last night.

昨夜有严重霜冻。

youdao

It has a humid subtropical monsoon climate, characterized by warm winter, hot summer, little frost and snow, heavy fog and less-than normal sunshine.

它以潮湿的亚热带季风气候为主，其独特的天气特色是冬暖，夏热，少霜雪，浓雾和低于常规的日照。

youdao

"On the night of 21 May we had quite a heavy frost in Armagh and in this orchard we got down to almost minus two degrees, " said Graham.

BBC: Graham Hewitt and his wind machine