unguarded interval无: not have; there is not; be w ...保护: protect; defend; guard; safe ...间隔: interval; space; spacing; bl ...保护间隔: guard band; guard space无保护: u rotected; unprotected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:无保护间隔，即可在微信中查询翻译
