When she arrived in Moscow, a Soviet official gave her a special travel permit, because he liked her industrial photographs.
当她到达莫斯科,一名苏联官员给了她一张特殊的旅游许可证,因为他喜欢她的工业化照片。
TED-Ed(视频版)
East Germany tried to defuse tension by making travel permits easier to obtain.
东德试图通过让旅行许可证更容易获得来缓和紧张局势。
英语百科
Permit to travel
(重定向自Travel Permit)
In the ticketing system of the British rail network, a Permit to Travel provisionally allows passengers to travel on a train when they have not purchased a ticket in advance and the ticket office of the station they are travelling from is closed, without incurring a penalty fare.