短語(yǔ)詞組短語(yǔ)regeneration under crown cover 林冠下更新tunnel under shallow cover 淺埋隧道under separate cover 另封;另郵;另函郵寄under plain cover 以普通信封寄發(fā);用沒(méi)有注明商號(hào);繙譯;沒(méi)有注明寄發(fā)人姓名under insurance cover 根據(jù)保險(xiǎn);根據(jù)保險(xiǎn)涵蓋under the cover 遮蓋著under superficial cover 冠冕堂皇under r cover to 附在信中send under plain cover 用不注明發(fā)信人姓名的封皮寄發(fā)undercover agent 臥底；警方密探 返回 under cover