[电] degree of inherent distortion of a channel

bō dào de gù yǒu shī zhēn dù ㄅㄛ ㄉㄠˋ ㄉㄜ˙ ㄍㄨˋ ㄧㄡˇ ㄕ ㄓㄣ ㄉㄨˋ