On the Wikipedia entry for jurassic park it reads as follows :

>
> 現実では、2012年のマードック大学の研究によって、DNAの半減期が521年で、DNAの復元に必要な長さのDNA断片が残るのは約100万年前までと推定され、恐竜の絶滅から約6500万年が経過した現代では、生息当時のDNAを用いた恐竜の再生は実現不可能であると判明した

Saying that dinosaur can not be revived since a DNA of sufficient lenght - for
revival-could at best survive for 1 million years while dinosaurs have been
extinct for at least 65 millions years . What i find troublesome is this
sentece:

> DNAの復元に必要な長さのDNA断片が残るのは約100万年前までと推定され

The original English that this is translated of reads : “

> If the decay rate is accurate then we predict that DNA fragments of
> sufficient length will preserve in frozen fossil bone from around one
> million years in age,” .

should not the translation be somthing like DNAの復元に必要な長さのあるDNA断片が残るのは/
DNAの復元に必要な長さあるDNA断片が残るのは ? Because from i what i understand
DNAの復元に必要な長さのDNA断片が残るのは translate to : " and it is estimated that DNA
fragments of the length required for DNA restoration will only remain until
about one million years ago" .
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2023-07-01T16:29:08.457
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question
grammar meaning sentence
Is there a difference between using の and ある in this sentence?