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 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 那里的血管网比较贴近皮肤表层
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. 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. 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 在树荫下 它们虽然避开了太阳的能量
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. 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. 待到阳光最毒辣之时 地面温度已升高至70℃