2.Coal is formed from the remains of freshwater plants.
煤是由淡水植物遗骸形成的。
3.The one sawfish species that did not receive the highest level of protection is a freshwater sawfish found in Australia.
目前唯一一未被列为高度保护的钜鲛,为发现于澳洲的淡水锯鲛。
4.Freshwater and suitable concentration of formalin, copper sulfate and sodium salinomycin were the better way to prevent and cure Cryptocaryoniosis.
在药物防治刺激隐核虫的研究中发现淡水和合适浓度的福尔马林、硫酸铜和盐霉素钠是比较好的防治办法。
5.Benthos The organisms that live on the bottom sediments of freshwater and marine ecosystems. They include plants and algae (phytobenthos) that grow below low tide mark.
底栖物(底物):在淡水或态系统底部活的物体。包括一些水底的植物和藻类。
6.The Curronian Bay including the lower Nemunas, is the richest freshwater source of fish in Lithuania, where fish production (pikeperch, smelt, roach) is 1,300 tonnes a year.