Date to 與date at的差異?

請問在以下兩句中,date to與date at可以互換嗎?在使用這兩個詞組時有什麼要特別注意的?感謝 The teeth and jawbones found in Tanzania by Dr. Mary Leakey and dating to 3.75 million years ago are the oldest reliably dated human fossils. Fossils of the arm of a sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the... 顯示更多 請問在以下兩句中,date to與date at可以互換嗎?在使用這兩個詞組時有什麼要特別注意的?感謝

The teeth and jawbones found in Tanzania by Dr. Mary Leakey and dating to 3.75 million years ago are the oldest reliably dated human fossils.

Fossils of the arm of a sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on the Greater Antilles islands.
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