李一周的回答：

joc 谑) frost considered as a person （拟人化的）霜: Look what pretty patterns Jack Frost has painted on the windows. 瞧霜大哥在窗户上绘制了多麽美丽的图案.

謝絕ㄣ戀愛的回答：

wiki上查的 我们一起来学习一下吧 jack frost

for other uses, see (disambiguation).

jack frost is a figure believed to have originated in viking folklore, an elfish creature who personifies crisp, cold, winter weather. he is said to leave those frosty crystal patterns on leaves and windows on cold mornings. it is also thought that the english derived the name jack frost from the norse character names, jokul ("icicle") and frosti ("frost"). jack frost has also appeared in christmas stories.

邱峰的回答：

一种拟人化的说法。。