英语词汇U-boat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	U-boat
词根词缀	词源： 1916 (said to have been in use from 1913), partial translation of Ger. U-boot, short for Unterseeboot, lit. "undersea boat."
随便看	unwonted unworldly unworthy unwrap unwritten unyielding unzip up- up up and doing up and down Upanishad upas upbeat upbound upbraid upbringing upchuck upcoming update updraft upend upfront upgrade upheaval

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