查词典，time capsule 的解释是：

time capsule  a container which is filled with objects considered to be typical of the present period in history and then buried, so that it can be dug up and studied in a future period 时代文物秘藏器（装入具有时代特征的物件后埋入地下，以供后世发掘研究）

在具体句子中如何翻译比较好？不至于就翻译成“时代文物秘藏器”吧！