| 词汇 | radar |
| 词根词缀 | 词源： 1941, acronym (more or less) for radio detecting and ranging. The U.S. choice, it won out over British radiolocation. 词根记忆： n. 雷达The patriot's radar made the radical patient impatient.爱国者的雷达使激进病人不耐烦. |
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