Which is the example of the freshwater fish in salt water, or the saltwater fish in fresh water.
很典型的例子，淡水鱼放在在盐水中，或者咸水鱼放在淡水中。
The main freshwater resources are deep fresh ground water and rainfall.
深层地下淡水和天然降水是该区主要淡水资源。
The groundwater environment system of the costal zone is a complicated system which includes the freshwater environment, the tide environment and the salt-fresh water environment system.
海岸带附近的地下水环境系统是容淡水环境、海水潮汐环境、咸淡水混合环境为一体的复杂系统。
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