dialing out拨: move with hand,foot,stick,et ...外线: exterior lines分机直拨外线: direct outward dialing分机用户直拨外线用户制: direct outward dialing system为分机用户代拨外线: dial out for an extension下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:拨外线,即可在微信中查询翻译