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孑遗
曾经分布广泛或比较广泛,且数量和种类均很多,但随着时间推移逐渐衰退,或在重大事件特别是灭绝事件打击之后遭受重创,只有少数个体和种类孤独地生存于个别地区,并有日趋灭绝之势的生物。生物宏演化进程中的分类单元型式。
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magnetic tape unit
magnetic targeting
magnetic targeting therapy
magnetic temperature scale
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magnetic test for transport vehicle
magnetic testing
magnetic texture
magnetic therapy devices
magnetic thermal effect
magnetic-thermal effect
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magnetic thickening of mineral processing products
magnetic thin film
magnetic thin film material
magnetic tongue
magnetic torque
magnetic torquer
magnetic torsion balance
magnetic tracer method
magnetic track
magnetic transition
magnetic trap
magnetic tuning filter
magnetic tuning laser
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