While the need to rank historical causes in some order of importance may seem obvious to most historians, such hierarchies raise serious philosophical difficulties.

虽然对大多数历史学家来说，根据重要性对历史原因进行排序的必要性似乎是显而易见的，但这种等级制度引发了严重的哲学难题。

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Furthermore his role at the outset of that conflict was as a military staff member and he didn’t raise to the rank of General until much later, in the Civil war.

在这场战争初期，胡克尔还只是一名作战参谋；过了许久，一直到了南北战争时期，他才被提拔为将军。

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Boost words: This dictionary specifies terms and phrases that raise or lower the rank value of the document in which the term appears.

Boost单词：这个字典指定的词汇和短语会影响出现这些词汇的文档的排名值。

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