| 单词 | B12,Vitamin |
| 释义 | B12,Vitamin《英文msh词典》B12,Vitamin [入口词] B12,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. |
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