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substitution [substitutions]▼◼◼◼noun[UK: ˌsʌb.stɪ.ˈtjuːʃ.n̩] [US: ˌsʌb.stə.ˈtuːʃ.n̩]
trisubstitution▼[UK: trˌaɪsəbstɪtjˈuːʃən] [US: trˌaɪsəbstɪtˈuːʃən]
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