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单词 methene
释义 meth·ene
\ˈmeˌthēn\ noun
(-s)
Etymology: International Scientific Vocabulary meth- + -ene
1. : methylene
2. : a complex unsaturated derivative of methane of the general formula R−CH . R′
 < di-pyrryl-methene HNC4H3−CH . C4H3N >
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