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单词 optionality
释义

WordReference Random House Unabridged Dictionary of American English © 2024
op•tion•al  (opshə nl),USA pronunciation adj. 
  1. left to one's choice;
    not required or mandatory:Formal dress is optional.
  2. leaving something to choice.
  • option + -al1 1755–65
op′tion•ali•ty, n. 
option•al•ly, adv. 
    • 1.See corresponding entry in Unabridged . discretional, elective, voluntary.

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