绍斯塔克说这个过程只能在淡水池中发生，盐水会破坏脂肪酸。
This could only have happened in fresh water ponds, salt water destroys the fatty acids, says Szostak.
北美的一种棕色的小涉水鸟（花嘴 巨） ，喙短而厚，呈浅白色，常见于淡水池塘和沼泽中。
A small, brown, North American diving bird (Podilymbus podiceps) having a short, heavy, whitish bill, found in freshwater ponds and marshes.
这种独特的爬行动物早已成为了全球动物保护者们的圣像，因为它在分类上没有任何近亲，并且被视为最能适应在淡水池塘与河流中生活的龟类。
The unique reptile has become an international conservation icon, due to it having no close relatives and being considered the turtle most adapted to life underwater in freshwater ponds and rivers.
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