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holostei (fossil)
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holostei (fossil)
全骨鱼类(化石)
进化阶段和特征组合上介于软骨硬鳞类和真骨鱼类之间的辐鳍鱼类。以现生于美洲淡水中的雀鳝(Lepisosteus)和弓鳍鱼(Amia)为代表。
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direct mail advertising
direct manipulation
direct-mapped cache
direct mapping
direct market valuation approach
direct measurement
direct measurement for electrical quantities
direct measurement of radiation environment
direct memory access
direct memory access, DMA
direct methanol fuel cell
direct methanol fuel cell, DMFC
direct method
direct method of variation
direct method to determine flux control coefficient
direct method weighting
direct microscopic count method
direct modeling
direct molecular dynamics
direct moral education
direct motion
direct motor thrust contro
direct moxibustion
direct multiplication
directness
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