英语词汇protractor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	protractor
词根词缀	protractor 量角器，分度规来自protract, 拖延，延长。
随便看	ludicrous ludo luff lug luge Luger luggage luggage rack lugubrious lugworm lukewarm lull lullaby lumbago lumbar lumbar puncture lumber lumbering lumberjack lumberyard lumen luminance luminary luminous lumme

英语词根词缀词典收录了25228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。