根据同分异构的化学原理，有机物有相同的分子式和相同的官能团时，它们的化学性质和物理性质很相似。
According to the principle of isomeric chemistry, when organic substances have the same molecular formula and the same functional groups, their chemical and physical properties are very similar.
辛烷一种具有这种分子式的同分异构的石蜡氢碳化合物，此式为c8h18，在石油中发现，用作燃料和溶剂。
Any of various isomeric paraffin hydrocarbons with the formula C8H18, found in petroleum and used as a fuel and solvent.
我们的分析无法指出WD-40中到底含有其中的哪一种。 不过WD-40作为溶剂使用时这几种同分异构体没有多大区别。
Our analysis can't determine which ones are present here, but if you're using it as a solvent, as is likely the case with WD-40, they all work just fine.
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