time capsule

1. N a container holding articles, documents, etc, representative of the current age, buried in the earth or in the foundations of a new building for discovery in the future 時空膠囊; 內存具有時代特征的文章、文件等的密藏容器，埋在地下或新建建築物地基下供後人發(fā)現竝了解現代情況