1. It is always a good idea to keep a lot of supplies in the home, even before winter begins.
2. According to the meteorological definition, winter officially begins when temperatures stay below 10 C for at least five consecutive days.
3. The Southern Hemisphere's winter begins on June 21, and resort operators are concerned that a prolonged eruption could keep away tourists.
4. As winter begins to tighten its icy grip on Beijing, homeless people across the city are being encouraged to move into temporary refuge centers.