unknown quantity

名词 n.
中文释义

英文释义

名词 n.
  1. A person or thing whose nature or value is a mystery. idiomatic
    — Whatever he had learned of himself was here of no avail. He was an unknown quantity.
  2. Used other than figuratively or idiomatically: see unknown, quantity.
    — Many of the applications of mathematics require that you identify an unknown quantity, assign a variable to that quantity, and then attempt to express another unknown quantity in terms of that variable.

词形变化

unknown quantities plural
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