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同质异位素
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同质异位素
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同质异位素
具有相同质量数(核子数)的不同原子序数的一类核素。又称同量素或同量异位素。
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roof-angle prism
roof fall
roof garden
roof greening
roofing beam
roofing engineering
roof iris
Roofloy
roof of coal seam
roof planting
roof prism
roof-ridge decorative animal sculptures
roof strata collapse of working face
Roof Tile With Monster-mask
Rooftop
roof top reflector
roof truss
roof turf
Rookie play prize
Rook number
Rook polynomial
rook polynomial
Rook reciprocity theorem
Rooks problem
Rook tour
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