razor-thin
adjective uk/ˌreɪ.zəˈθɪn/ us/ˌreɪ.zɚˈθɪn/
(区别)细微的,极小的,微乎其微的
A razor-thin difference in amount is very small.
The president won the election by a razor-thin margin. 总统以极微弱的优势赢得大选。
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