求翻译：如在沿岸沉积物中，甲基汞只占总汞的一小部分（0.1%-0.75%，平均0.47%），这一定程度上是由于无机汞的颗粒活度（影响其与沉积物颗粒的结合力）远高于甲基汞，无机汞在沉积物中的分配系数通常为103-105，而甲基汞的分配系数则为101.5-103.5. 但因为甲基汞具有更高的毒性，并且其更容易在生物中、特别是食物链中处于较高位置的物种（如鱼类）中富集，而直接威胁人类健康，故甲基汞相对无机汞受到更多的关注．沉积物作为汞在水体中的主要分布相及众多水生生物的栖息地（如蟹、海参、蛤等），也就成为了包括食用水产在内的许多生物吸收汞的主要途径。是什么意思？

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If in the coast deposit, the methyl mercury only occupies the total mercury a small part (0.1%-0.75%, average 0.47%), in this certain degree is because the inorganic mercury pellet activity (affects it with deposit pellet binding force) to be higher than the methyl mercury far, the inorganic mercury

Such as in coastal sediments, methyl mercury represents only a small fraction of total mercury (0.1% per cent, an average of 0.47%), which is partly due to particles of inorganic mercury activity (effects of sediment particles and its binding force) is much higher than methyl mercury and inorganic m