英语词汇expectoration的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

词汇	expectoration
词根词缀	Online Etymology Dictionary expectoration n. 1670s, noun of action from expectorate.
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英语词根词缀词典收录了54763条英语词根词缀词条，基本涵盖了全部常用英语词汇的词根、词缀及词根记忆法解析，是记忆英语词汇的必备工具。