据联合国教科文组织公约，非法出口，被盗，被洗劫的文物，或者战争期间丢失的文物，应该不受任何限制的时间限制将其返还原国。
According to the UNESCO Convention on Stolen and Illegally Exported cultural Objects, any cultural relics looted or lost during wars should be returned without any limitation of time span.
本周联合国教科文组织（UNESCO）在伊斯坦布尔召开世界遗产公约年会。
This week UNESCO held its annual World Heritage convention in Istanbul.
当年在斯德哥尔摩会议上阐述了美国的构想，他在由联合国教科文组织支持的公约制定过程中发挥了关键作用。
S. presentation in Stockholm and played a key role in the founding of the convention under the auspices of UNESCO.
当年在斯德哥尔摩会议上阐述了美国的构想，他在由联合国教科文组织支持的公约制定过程中发挥了关键作用。
S. presentation in Stockholm and played a key role in the founding of the convention under the auspices of UNESCO.
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