safe conduct
noun [ U ] uk/ˌseɪf ˈkɒn.dʌkt/ us/ˌseɪf ˈkɑːn.dʌkt/
安全通行权;安全通行证
official protection from harm while travelling through an area, or a document that gives this
In exchange for the hostages, the terrorists demanded safe conduct out of the country. 恐怖分子要求以安全出境作为交换人质的条件。