请问T-4-Q1一道题翻译

lr_winter

请问一句翻译
T-4-Q1TS-7-41Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago,
pushing back by more than 150,000 years the earliest date at which humans are known to have made stone tools.

push back by more than 150000 years 怎么翻译，the earliest date 是修饰谁啊，不应该修饰前面这个pushing....years？150000years只是一个变化量，可是the earliest date应该修饰的是一个具体时间吧。

cc621josh

将已知的人类打磨石器的最早时间提前了超过150000年

原句还原：
humans are known to have made stone tools at the earliest date
"....." (前面一整句作为一个事实) pushes back the earliest date by more than 150,000 years.

earliest date没修饰谁，一个抽象的时间而已，你也可以替换成具体的例如200BC来理解

lr_winter

将已知的人类打磨石器的最早时间提前了超过150000年

原句还原：
humans are known to have made stone tools at the earliest date
"....." (前面一整句作为一个事实) pushes back the earliest date by more than 150,000 years.

earliest date没修饰谁，一个抽象的时间而已，你也可以替换成具体的例如200BC来理解

-- by 会员 cc621josh (2010/11/28 2:50:34)

原来是earliest date 和by more than倒装！！！！谢谢谢谢！