2 请问这是什么从句结构

用手机编辑的,不是很清晰见谅。further argument against the simple wear and tear theory is the observation that the time(within which organisms age lies between a few days and several thousand years, as with mammoth trees.)  

如果(within which organisms age lies between a few days and several thousand years, as with mammoth trees) 是time的定语从句,the observation that后面应该是同位语或者定语从句,但只有the time这一个词,不是一句话,这是什么结构呢?

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  • to serena 提出于 2023-03-07 17:49