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真蕨类
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真蕨类
Encyclopedia
理学
古植物学
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pteridophytes(fossil)
真蕨类(化石)
具多样化的大型羽状复叶、孢子囊单个或成群着生于叶下表面的一类植物化石。
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particle accelerator
particle accretion
particle analysis techniques
particle-antiparticle annihilation
particle-antiparticle conjugation
particle antiparticle pair annihilation
particle antiparticle pair production
particle-antiparticle pair production
particle-antiparticle transfonmation
particle antiparticle transformation
particle-antiparticle transformation
particle astronomy
particle astrophysics
particle beam
particleboard
particle board production
particle buoyancy force
particle charge
particle clusters
particle coarsening
particle collision
particle collision cross-section
particle concentration
particle concentration measurement
particle confinement
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