The cave-making recipe calls for a steady emission of volcanic gas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer.

洞穴的形成需要火山气体和热量的稳定释放，海拔高到足以防止每年的大量降雪在夏季融化。

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Accomplishing this feat requires adaptations both to generate heat in the turtle's body and to keep it from escaping into the surrounding waters.

完成这一壮举需要适应，既要在龟体内产生热量，又要防止它逃入周围的水域。

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Set your dryer on low or medium heat, and keep the dryer about six to eight inches away from your hair.

把你的吹风机调到低档或中档热度，离头发大约六到八英寸远。

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The C stands for cover. Wear a hat and scarf to keep heat from escaping through the head, neck and ears.

VOA: special.2009.12.23

To keep them from the heat, on the long train journey from his home in Buffalo, he had wrapped the samples stoutly in dry ice and newspaper.

ECONOMIST: Robert Rich

Mr. Bailes says he takes several steps to try and keep his employees safe from the heat.

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To concentrate the heat and keep it from escaping, lay a sheet of foil over the grill for 10 minutes.

CNN: New uses for Thanksgiving items