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B 12,Vitamin

b12vitamin

b12vitamin

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B 12,Vitamin翻译
《英文msh词典》B 12,Vitamin [入口词] B 12,Vitamin [主题词] Vitamin B 12 [英文释义] A cobalt-containing coordination compound produced by intestinal micro-organisms and found also in soil and water. Higher plants do not concentrate vitamin B 12 from the soil and so are a poor source of the substance as compared with animal tissues.
B 12,Vitamin详解