What does frost feather mean?

Item bank content:

Explanation of frostbite

Crow. Crows are fierce and greedy, so they are called. Song Hanwei's poem "Late Step": "first frost flies in the field, and the sand birds are scattered in the waves."

Word decomposition

Explanation of frost tiny ice particles attached to the ground or plants are condensed when the water vapor near the ground cools below zero degrees Celsius: first frost. Frost. First frost series (refers to the late autumn season). Cold autumn. Frost period. Something similar to frost: persimmon frost. Watermelon frost. White: frosted temples. The explanation of frost blade frost front gun is the same as "crow". Radical: birds.