Allusion is a historical metaphor, of which the original scene or scenario is abstracted into a phrase or a few words and the mapping relationship with what is described is in a connotative position.

典故是一种历史化隐喻，其原义的具体情节常被抽象化，并且与所描述的现时事件发生喻义上的冲突或错置，映现关系也处于隐含状态。

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The reason is that although "local resources" is a phrase invented by Su Li but it has historical sources.

其根本原因就是“本土资源”虽然是一个苏力发明的新词汇，但这类词汇其实是有历史渊源的。

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A historical review of the term indicates it originated in 2009, but Google trends show internet searches for the phrase really started to take off in the spring of 2013.

究其历史，这个词起源于2009年，但谷歌趋势表明该词网络搜索量激增是于2013年春天开始的。

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