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| 单词 | precursor |
| 释义 |
precursor UK [ˌpri:'kɜ:.sər] US [-'kɝ:.sɚ] slightly formal noun countable ■something which happened or existed before another thing, especially if it either developed into it or had an influence on it 先驱，先锋；先兆，前兆 •Sulphur dioxide is the main precursor of •Biological research has often been a precursor to |
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