cidr classless inter domain routing无级: stepless域: land within certain boundari ...间: space in between; opening路由选择: routing; route selecting分级域间路由选择: cidr class inter-domain routing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:无级域间路由选择，即可在微信中查询翻译
