《Hybrid 》作者：- Keith Laumer【EPUB】

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Hybrid 1 Deep in the soil of the planet, rootlets tougher than steel wire probed among glassy sand grains, through packed veins of clay and layers of flimsy slate, sensing and discarding inert elements, seeking out and absorbing calcium, iron, sulphur, nitrogen. Deeper still, a secondary system of roots clutched the massive face of the bedrock; sensitive tendrils monitored the minute trembling in the planetary crust, the rhythmic tidal pressures, the seasonal weight of ice, the footfalls of the wild creatures that hunted in the mile-wide shadow of the giant Yanda tree. On the surface far above, the immense trunk, massive as a cliff, its vast girth anchored by mighty buttresses, reared up nine hundred yards above the prominence, spreading huge limbs in the white sunlight. The tree was only remotely aware of the movement of air over the polished surfaces of innumerable leaves, the tingling exchange of molecules of water, carbon dioxide, oxygen. Automatically it reacted to the faint pressures of the wind, tensing slender twigs to hold each leaf at a constant angle to the radiation that struck down through the foliage complex. The long days wore on. Air flowed in intricate