These are called crannogs and date back centuries before Christ.

这些被称为 crannogs，可以追溯到基督之前的几个世纪。

It's a reproduction of a 2,500-year-old crannog that archaeologists are excavating, as we speak, in Loch Tay, right now.

这是一个 2500 年前考古学家正在挖掘的 crannog 的复制品，就在我们说话的时候，就在 Loch Tay，就在此时此刻。