It's a phenomenon known as the tragedy of the commons.

这种现象称为" 公地悲剧" 。

We need to save ourselves from the tragedy of the commons.

我们需要将自己从公地悲剧中拯救出来。

This fish pond is just one example of a classic problem called the tragedy of the commons.

这个鱼塘只是公地悲剧这一经典问题的一个例子。

That's a simplified example, but the tragedy of the commons plays out in the more complex systems of real life, too.

这是一个简单的例子，但公地悲剧也在现实生活中更复杂的系统中上演。