And the changes in ocean chemistry are the sort of thing that can be expected to have a direct effect on the geological record if carbon levels rise far enough.
如果碳浓度上升得足够高，则大洋中化学成分的改变可以预料到会对地质编录产生直接的影响。
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The paper also stresses four problems in doing agricultural geological work in terms of the relation between agricultural chemistry and geochemistry.