本文作者： 21ST
Hello, Mr Polar bear!你好，北极熊先生！What do you go to an aquarium (水族馆) to see? How will you feel if you see a polar bear (北极熊) there? Koda is a polar bear. He lives in the aquarium at a zoo in the US. He weighs (重) 408kg. But he is a great swimmer5．