| 单词 | retarder |
| 释义 | retarder /ri tahr"deuhr/, n. 1. a person or thing that retards. 2. Chem. a. any substance added to rubber to delay or prevent vulcanization. b. any substance added to delay a process. 3. Building Trades. an admixture of concrete or plaster that retards its set. [1635-45; RETARD + -ER1] |
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