nmr 基本解释 nuclear magnetic resonance 核磁共振 同首字母单词 na [nə] naacp [ˌen dʌbəl ˌeɪ siː ˈpiː] naad naafi [ˈnæfi] naan [nɑːn] nab [næb] nabam ['neɪbəm] nabber ['næbə(r)] nabbie ['næbɪ] nabe [neɪb] nabeshima nabi ['nɑːbe]