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??,???,???.????λ???? ??????????λ??磬?λ16O17O18O????λ??%?99.760.040.20?з?21?????λ?19F23Na27Al?λ??100% ????λ?????÷????λ?????λ????Щ??????10B??20.316%~19.098%????20.0%????? ?λ????27??У??λ????14N?99.64%15N?0.36%27???λ???10??λз120Sn?32.4%????У?.

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