However, it is limited because of some problems associated with its direct use, which includes membrane flux decline and insufficient removal of dissolved organic matter.
然而，它是有限的，因为一些问题与它的直接使用，其中包括膜通量下降，不足以消除溶解的有机物质。
2
One of the key issues in the marine ecosystem dynamics studies is to accurately estimate the dissolved biogenic substance flux across the sediment-seawater interface in the shelf sea.