单词	gum--gingiva
释义	gingiva，gum齿龈，龈
随便看	voice-frequency carrier telegraph voice-frequency carrier telegraphy voice-frequency dialing voice frequency equipment voice-frequency facility terminal voice-frequency-multichannel system voice frequency multi-channel telegraphy voice-frequency-multichannel telegraphy voice-frequency repeater voice frequency telegraph voice-frequency telegraph system voice-frequency telegraphy voice frequency {=vf} voiceful voicefulness voice generator card voice grade voice-grade channel voice-grade circuit voice grade line voice-grade modems voice-grade service voicegram voice heard in heaven, voice id