/-{-{fǎnkuì}-}-/, /faːn³⁵ kʷɐi̯²²/, /faːn³⁵ kʷɐi̯³³/, /faːn³⁵ kʷʰɐi̯¹³/, /hu̯an⁵³⁻⁴⁴ ku̯i²²/, /hu̯an⁵³⁻⁴⁴ kʰu̯i²²/, /hu̯an⁵⁵⁴⁻²⁴ kʰu̯i⁴¹/, /faan2 gwai6 / faan2 gwai3 / faan2 kwai5/, /faan2 gwai6 / faan2 gwai3 / faan2 kwai5/, /faankuey/, /fan2 guei6 / fan2 guei3 / fan2 kuei5/, /fǎnkuèi/、/ㄈㄢˇ ㄎㄨㄟˋ/
(電子學，模控學，控制理論) 在系統中，將部分輸出回授至輸入端

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