substitution

/ˌsʌb.stɪˈtu.ʃən/ 名词 B2

中文：替代、代入

The act of substituting or the state of being substituted. (countable, uncountable) · In this football tournament, three substitutions can be made during the match.
A substitute or replacement. (countable, uncountable) · Gary is off this weekend, so Jeff will be his substitution.
The replacement of an atom, or group of atoms, in a compound, with another. (countable, uncountable)
The expansion of the lexicon of a language by native means in correspondence to a foreign term. (countable, uncountable)

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