Recent space travels have shown that the body needs specialexercise in a spaceship to suit the weightless conditions.
最近的宇宙飞行表明，人体需要在宇宙飞船中进行专门训练才能适应失重的情况。
2
Users can enjoy the water or snow pleasure without specialexercise. When the utility model is not in use, air inside an air bag can be released out to fold the sliding bag to store.
In this simplified code, we have no special treatment of the different faults; however, in a real implementation, we would need to exercise these different paths.