Experiments test the influences of pressure, height, nozzle aperture and frog momentum on the fire control effect of fine water mist.

实验主要通过测定压力、高度、喷头孔径的大小和雾动量对细水雾灭火效果的影响。

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Melting ice, droughts, earlier springs, as well as disappearing polar bears and frog extinctions are among the signs that global warming is already having an effect on the planet, experts say.

专家说，冰层融化，干旱，春季提早，以及北极熊和青蛙的消失，都在向我们发出信号：全球变暖已经在影响这颗星球了。

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