Have you got your thermals on?
你穿上保暖衣了吗？
Birds use thermals to lift them through the air.
鸟类利用上升的暖气流升空。
Are the thermals picking up any signs of life?
热量探测器有没有检测到生命迹象？
Thermals are rising air currents caused by heat.
上升暖气流是由于受热而上升的气流。
Thermals start when the sun heats the air unevenly.
热气流的诞生归功于太阳对地表的不均匀加热。
This usually grants a hang glider a good ten-minute flight back down to Earth, even if there are no rising thermals to help keep the craft aloft.
即使没有使滑翔机保持上升的热气流，这种飞行方式依然可以让飞行者在空中飞上个十几分钟。
As paragliders and glider pilots, they soar like hawks higher and higher, using air heated by the sun, called thermals, to rise high in the sky.
作为滑翔伞和滑翔机的驾驶员，他们利用太阳带来的空气热动力，也称为上升暖气流，像鹰一样越飞越高。
Not so in winter, yet the bare trees against the backdrop of a cloudless blue sky, punctuated by vultures riding the thermals, provided a stark beauty all of its own.
而冬天的景致则全然不同，光秃的树木、蔚蓝的长空以及几只乘着气流翱翔的秃鹫共同组成了一幅独具特色的苍凉画卷。
Daydreaming in summer, looking upwards, he noticed that the larger birds, hawks and eagles, could stay aloft for longer, riding thermals with supreme elegance without flapping their wings.
在消夏的时候，仰望天空，他注意到大一点的鸟儿，例如鹰和隼，能乘着热气流在高空中不拍打翅膀极其优雅地逗留很久。
Daydreaming in summer, looking upwards, he noticed that the larger birds, hawks and eagles, could stay aloft for longer, riding thermals with supreme elegance without flapping their wings.
在消夏的时候，仰望天空，他注意到大一点的鸟儿，例如鹰和隼，能乘着热气流在高空中不拍打翅膀极其优雅地逗留很久。
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