北极熊可能非常危险。

___Polar ___bears can be very dangerous.

因此，为一些动物创建现实条件非常困难，例如北极熊和老鹰。

So it's very difficult to create real-life conditions for some animals, for instance for ___polar ___bears and eagles.

北极熊很好地适应了北极气候。

The ___polar ___bear is well-adapted to the Arctic climate.