average date of frost是什么意思

用法例句

Obtains statistics of the weather data for the potential regions for using air source heat pumps in China, and the related values of the mean loss coefficient of frosting defrosting which are recommended as design reference data.

统计分析了我国空气源热泵适用地区的气候特点 ,得出了相应地区不同使用情况下的平均结霜除霜损失系数 ,推荐作为设计参考依据。