英语词汇smart as a whip的起源、历史背景-英语词源词典

词汇	smart as a whip
词源	See smart as a steel trap
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英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。