Winter cold snap, window. 冬季寒流， 窗。

bus window, the western Ukrainian city of Lviv 車窗 , 烏克蘭 

Yuriy Dyachyshyn / AFP - Getty Images
PhotoBlog - Winter cold snap kills dozens in eastern Europe
http://photoblog.msnbc.msn.com/_news/2012/01/30/10275276-winter-cold-snap-kills-dozens-in-eastern-europe

 the window of a streetcar in Sofia, Bulgaria 車窗，保加利亞

DIMITAR DILKOFF/AFP/Getty Images
The world in photos: Tuesday, January 31, 2012 | News | National Post
http://news.nationalpost.com/2012/01/31/the-world-in-photos-tuesday-january-31-2012/

 (Vadim Ghirda/Associated Press)
Extreme cold weather hits Europe - The Big Picture - Boston.com
http://www.boston.com/bigpicture/2012/02/extreme_cold_weather_hits_euro.html

REUTERS/Vasily Fedosenko
The Big Freeze >> TotallyCoolPix http://totallycoolpix.com/2012/02/the-big-freeze/

UK weather forecast: After temperatures plunged to MINUS 18C - get ready for the half term thaw | Mail Online http://www.dailymail.co.uk/news/article-2099233/UK-weather-forecast-After-temperatures-plunged-MINUS-18C--ready-half-term-thaw.html

Darren Calabrese/National Post
Photo: Wednesday’s snow storm in Toronto | Photos | National Post
http://news.nationalpost.com/2012/02/29/photo-wednesdays-snow-storm-in-toronto/