| 单词 | let alone | 
| 释义 | Word Frequency let alonemuch less; not to mention   they can't afford a meal out, let alone a holiday Word Frequency let alonea. (conjunction) much less; not to mention  I can't afford wine, let alone champagne b.  let be  to refrain from annoying or interfering with  let the poor cat alone  | 
	
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