“白霜”造句

昨天地上有白霜.
There was white frost on the ground yesterday.

盘型的百分率随白霜频率而异,自30到90.
The percentage of plate types ranges from 30 to 90 depending upon hoarfrost frequency.

清晨,草上覆盖着一层白霜.
The grass was covered with frost in the early morning.