表示在湖里有许多鱼的英语是："There are many fish in the lake."
来源：这是一个简单的句子，是英语学习者们经常接触到的。
一些例句及其中文翻译：
I pke to fish in the lake because there are many fish.
我喜欢在湖里钓鱼，因为湖里有许多鱼。
The lake is a great place to fish because there are many different types of fish.
这个湖是一个很好的钓鱼地方，因为湖里有很多不同种类的鱼。
I was surprised to see how many fish were in the lake.
我惊讶地发现湖里有这么多鱼。