事实上,它是一个抽水涡轮,可以产生足够的水流使北极熊保持在原来位置。因此,你虽然游了,但还是在原地不动。你还在锻炼吗?

• MOOS Actually, it is a pumping propeller that creates enough current to hold a bear in place. So you swim but you don't go anywhere. You still have exercise?