Even the nice fresh pure spring water, birds and fish poop in it.
即使是新鲜纯净的好泉水，鸟和鱼也在里面排便。
Why saltwater fish are unhappy in fresh water.
为什么咸水鱼在淡水中过的不舒服。
This is what drives the death of saltwater fish in fresh water, right?
这是导致咸水鱼，在淡水中死亡的原因，对吗？
And even the nice fresh pure spring water? Birds and fish poop in it.
并且即使是好的纯净泉水，鸟和鱼也在里面排便。
However, till now, very little information regard trypsins from fresh water fish has been reported.
但是，目前国内外关于淡水鱼胰蛋白酶的报道很少。
Migrating up rivers from the sea to breed in fresh water. Used of fish.
从海洋向上游到河流中，并在淡水中产卵的。用于指鱼。
This fish tank is full of fresh water, not salt water.
这个鱼缸装的是淡水，不是海水。
This kind of fish lives in fresh water.
这种鱼生活在淡水中。
This kind of fish lives in fresh water.
这种鱼生活在淡水中。
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