| 单词 | ablaut | 
| 释义 | ablautnoun  ab·laut  ˈä-ˌblau̇t  ˈäp-ˌlau̇t   : a systematic variation of vowels in the same root or affix or in related roots or affixes especially in the Indo-European languages that is usually paralleled by differences in use or meaning (as in sing, sang, sung, song)   | 
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