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稳定年龄分布
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稳定年龄分布
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稳定年龄分布
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stable age distribution
稳定年龄分布
如果出生率和死亡率保持不变,则种群各年龄级个体的相对比例不随时间而变化的年龄分布。
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underwater energy-saving management technology
underwater exlposive injury
underwater explosion
underwater fiber lighting
underwater fluorescence detection
underwater foundation bed dumping fill survey
underwater foundation bed leveling survey
underwater foundation trench construction survey
underwater foundation trench excavation measure
underwater gamma-ray survey
underwater gas separator
underwater glider
underwater grabber
underwater gravimeter
underwater hunting
underwater hyperspectral imaging technology
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Underwater Impressions
underwater junction technology
underwater kit
underwater laser-induced breakdown spectroscopy
underwater laser transmission
underwater launch
underwater light field
underwater lighting
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