這句英語的一個that從句難倒我了,
This indicates that the source of the sediments and predominant post-depositional
processes have remained rela-tively unchanged during the approximately 700
years that the upper 2 m have been accumulating.
這句話的大部分我能理解,我不是要求你們?nèi)姆g,這句話關(guān)鍵是最下面那行的year后面的that,它不像是修飾year這個單詞的定語從句的開頭,那個during也不能攪到后面的從句里面來,我把我理解的意思先寫出來.
This indicates that the source of the sediments and predominant post-depositional
這表明了沉積物（sediments）的來源和主要的沉積后（post-depositional
processes have remained relatively unchanged during the approximately 700 years
在大約700年的時間里,保持相對的不變
that the upper 2 m have been accumulating.
在這700年里,最上面的2m一直在累積.
這段翻譯就是最后那個在這700年里那句我覺得不妥,that不像是year的定語,作定語的話少了個介詞,那么它到底是什么呢?