英语词汇lockdown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	lockdown
词根词缀	词源： from 1940s in various mechanical senses, from lock (1) + down (adv.). Prison sense is by 1975, Amer.Eng.
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