surface availability的意思|示意

Surface sediments were sampled from the mangrove wetland in Quanzhou Bay to study the distribution, speciation, and bio-availability of mercury in the sediments.

采集了泉州湾红树林湿地表层沉积物样品，测定了沉积物中不同形态汞的含量，研究了汞的分布特征、赋存形态及其生物有效性。

Surface waters are expected to form more stable layers as the oceans warm, which will affect the availability of nutrients and, it is increasingly feared, of oxygen.

当海洋变暖时，海水表面会形成更稳定的薄层，薄层会影响水面上营养物质的有效性，更让人焦虑的是，会影响到氧的使用。