date to 还是date at?

huangsiyan

本来很肯定date at 正确，date to 错误，但刚看到OG12上有道题的提干上：
excavators at the indus Valley site of Harappa in eastern Pakistan say the discovery of inscribed shards dating to circa 2800-2600 B.C.

请问，date to 到底对不对啊？

jianglxiang

date to in the above sentence is right.

huangsiyan

那如果语法题中遇到了date at 和date to是不是就不能一下排除date to了？

mudiduanger

我个人感觉，date at是在estimate age。但date to是某一个时代