In addition, they have the knowledge on how to make a fire to keep them warm and heat their foods.

另外，他们懂得用火保暖，加热食物。

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Today, commercial aircraft remove ice that accumulates on wings in-flight by redirecting hot air from the jet engines to the leading edge of the wings to keep them warm.

今天，商用飞机主要靠把从喷气式引擎排出的热空气引导到机翼的边缘，使它们变暖，以此来达到除冰的目的。

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Both the father bird and mother bird sit on the eggs to keep them warm.

鸟爸爸和鸟妈妈伏在蛋上为它们取暖。

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They will place extra covering around the chest, head and neck of hypothermia victims to keep them warm.

VOA: special.2009.12.30

In cold weather, many of these young volunteer firefighters wore coats made of the skin of buffalo to keep them warm and dry.

VOA: special.2009.05.17

The poults are fenced in around brooder units with heat lamps when young to keep them warm.

BBC: RELATED BBC SITES

We have children who don't have the clothes to keep them warm.

CNN: Edwards: 'Tonight we started a movement'

They even hand out the odd jumper to keep them warm.

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