求翻译：因而对于沉积物中汞的生物可利用性及其影响因素的研究，对于预测汞的生物富积和食物链传递，以及水体中汞的生态风险评估均有重大的意义。是什么意思？

For sediments in which the bioavailability of mercury and its influencing factors for the prediction of mercury bioconcentration and food chain, and ecological risk assessment of mercury in water are of great significance.

The sediments in the biological availability of mercury and its implications for predicting factors, the study of biological tomitsumi mercury and the food chain, as well as mercury in the water body of ecological risk assessment will be of great significance.

Thus regarding the deposit in the mercury biological exploitability and the influence factor research, regarding the forecast mercury biological rich product with food chain transfer, as well as in the water body the mercury ecology risk assessment has the significant significance.

Thus mercury bioavailability in sediments and its influencing factors of, for predicting mercury bio-accumulation and food chain transfer and ecological risk assessment of mercury in water it would be of great significance.

For sediments in which the bioavailability of mercury and its influencing factors for the prediction of mercury bioconcentration and food chain, and ecological risk assessment of mercury in water are of great significance.