In the future, they hope birds will live in the birdhouse and the heat of its green light will be used to keep birds warm in winter.

未来，他们希望鸟类能住在鸟窝里，鸟窝中绿光的热量可以用于给鸟类在冬天保暖。

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Because hot air rises, ceiling fans may be used to keep a room warmer in the winter by circulating the warm stratified air from the ceiling to the floor.

因为热空气上升，冬季，吊扇使从天花板到地面之间的气体层循环来保持房间温暖。

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It is usually warm in winter in the south, but it can be cold and even have snow sometimes.

南方的冬天通常是暖和的，但有时也会很冷，甚至下雪。

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Mold spores can be highest in rainy winter months in warm climates, such as California.

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An unseasonably warm winter in most parts of the country also means that the fleas and ticks will be in full force this summer, and grooming is one more way you can regularly check your pet for issues.

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Most analysts expect oil prices to be softer in the first quarter as the euro-zone crisis dominates the news and unseasonably warm winter weather keeps oil demand weak.

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