短语词组短語broad -band excitation 寬帶激勵broad d band 寬帶;寬頻帶broad d band absorber 寬帶吸收器broadband network 寬帶網絡broadband access 寬帶接入；寬頻存取；寬帶通信broadband access network 寬帶接入網broadband signal 寬帶信號 返回 broad band