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单词 retarder
释义

WordReference Random House Unabridged Dictionary of American English © 2024
re•tard•er  (ri tär′dər),USA pronunciation n. 
  1. a person or thing that retards.
  2. Chemistry
    • any substance added to rubber to delay or prevent vulcanization.
    • any substance added to delay a process.
  3. Buildingan admixture of concrete or plaster that retards its set.
  • retard + -er1 1635–45

Collins Concise English Dictionary © HarperCollins Publishers::
retarder /rɪˈtɑːdə/ n
  1. a person or thing that retards
  2. a substance added to slow down the rate of a chemical change, such as one added to cement to delay its setting
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更新时间：2025/2/23 12:48:33