- 推荐网络例句
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McCulloch kept the food and centers and got rid of the rest.
McCulloch留下了食品和健身中心,其它的都卖掉了。
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Dendroctonus valens ; sex attractant ; pest trapping effect ; effective attraction distance
红脂大小蠹;植物性引诱剂;诱杀效果;有效诱捕距离
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The octane number of 5 substances were predicted using the new methods.The results show that the second level group contribution method exhibits significant improvements in accuracy and should be used for estimating the octane number of branched and ring hydrocarbons.In cases of simple straight chain bydrocarbons, however,the first level group contribution method should be used.
用新方法对未参加回归的五种物质的辛烷值进行了预测,结果表明对于含有支链和环的烃应采用第二水平基团法估算其辛烷值,对简单的直链烃采用第一水平基团法估算其辛烷值。