backward channelreturn channel返回: return; go back; revert; rec ...通道: thoroughfare; passageway; pa ...返回通路: return path返回通报线路: report back link绕回通道, 返转通道: wraparound channel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:返回通道，即可在微信中查询翻译
