Black ice

（重定向自Glare ice）

Warning sign for icy pavement in Quebec, Canada

The I-35W Mississippi River bridge seen from below in 2006

Black ice, sometimes called clear ice, refers to a thin coating of glaze ice on a surface, especially on roads. The ice itself is not black, but virtually transparent, allowing the often black road below to be seen through it. The typically low levels of noticeable ice pellets, snow, or sleet surrounding black ice means that areas of the ice are often practically invisible to drivers or people stepping on it. There is, thus, a risk of skidding and subsequent accident due to the unexpected loss of traction. A similar problem is encountered with diesel fuel spills on roads.

单词	Glare ice
释义	Glare ice 英语百科 Black ice （重定向自Glare ice） Black ice, sometimes called clear ice, refers to a thin coating of glaze ice on a surface, especially on roads. The ice itself is not black, but virtually transparent, allowing the often black road below to be seen through it. The typically low levels of noticeable ice pellets, snow, or sleet surrounding black ice means that areas of the ice are often practically invisible to drivers or people stepping on it. There is, thus, a risk of skidding and subsequent accident due to the unexpected loss of traction. A similar problem is encountered with diesel fuel spills on roads.
随便看	Zero cross circuit zero cross detection Zero crossing zero crossing detection Zero crossing detector zero crossing discriminator zero crossing distribution zero crossing frequency zero crossing method Zero crossing ratemeter zero crossings zero cross level zerocrosslevel zero crossover zero cross point zero cross pulse zero cross signal zero cross switch circuit zero cure zero current zerocurrent zero current model zero current potentiometric titration zero current potentiometry zero curtain