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词汇 chemical effect
释义 chemical effect短语¹¹⁴⁴⁶⁷⁺
基本例句
化学效应
During several thousands or even tens of thousands years' carbonization under special physical and chemical effect, these noble trees become ebony.
经炭十四测定,大多数乌木的年代距今三千六百多年至几万年之久。 zghmjy
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