the

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and this is a real drain on the kangaroo's body fluids.
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and this is a real drain on the kangaroo's body fluids. 袋鼠真正排放出去的体液也就是这些

Even in the shade the earth is baking hot
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Even in the shade the earth is baking hot 即使是在树荫下 土地照样被烤得火热

where there is a network of blood vessels close to the surface of the skin
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where there is a network of blood vessels close to the surface of the skin 那里的血管网比较贴近皮肤表层

and, as the saliva evaporates, their blood is cooled.
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and, as the saliva evaporates, their blood is cooled. 因此 当唾液蒸发时 血液也能得到冷却

This thermal image shows just how effective the process is.
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This thermal image shows just how effective the process is. 这幅热影像能证明这种方法非常有效

The blue areas on the body are the cooler parts.
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The blue areas on the body are the cooler parts. 身上蓝色的部分是较冷的部位

In the shade they're shielded from much of the sun's energy
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In the shade they're shielded from much of the sun's energy 在树荫下 它们虽然避开了太阳的能量

Soon the heat will reach a critical point.
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Soon the heat will reach a critical point. 热度很快就会达到临界点

Any kangaroo out in the open is in serious danger of overheating.
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Any kangaroo out in the open is in serious danger of overheating. 任何一只呆在外面的袋鼠 都将面临中暑的威胁

In the full sun the temperature on the ground soars to 70 degrees.
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In the full sun the temperature on the ground soars to 70 degrees. 待到阳光最毒辣之时 地面温度已升高至70℃