1. It is always a good idea to keep a lot of supplies in the home, even before winter begins.
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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.
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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.