fogdog

fog.dog

n.（名词）
A bright or clear spot that appears in breaking fog.
雾虹：雾堤中有时可见的明亮部分

来源：
[From the fact that it accompanies fog as a dog accompanies its owner]
[从彩虹总是与雾同现就象一条狗陪伴其主人的事实中得来]