substitution [,sʌbsti'tju:ʃən]

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n. commutation��exchange��permutation��replacement

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1. The ceiling depends on the cost of substitution.
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2. The tendency to substitution may be overborne by a contrary tendency.
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3. Objective To discuss continuous kidney substitution treatment(CRRT) in the retrieval of serious burn patients' life function.
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n.
  1. an event in which one thing is substituted for another
  2. the act of putting one thing or person in the place of another:

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Substitution
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substitution threat
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Import Substitution
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substitution reaction
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factor substitution
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