Well, first we buttered my feet to get the swim fins off, and then we went out.
我们在脚上抹了点黄油才先把鱼鳍给脱了之后就出去了。
英语百科
Swimfin
Swimfins, swim fins, fins or flippers are finlike accessories worn on the foot or leg and made from rubber, plastic or combinations of these materials, to aid movement through the water in water sports activities such as swimming, bodyboarding, bodysurfing, kneeboarding, riverboarding, underwater hockey, underwater rugby and various other types of underwater diving.