1. It is not seen on television, movies, freedom of travel envy divers in the sea? 是不是看到电视里、电影里，潜水员在海中自由来去羡慕不已？
2. As scuba divers sink deeper underwater, the weight of the water above them creates pressure. 同样的戴水肺的潜水员深深沉入水下，水的重担给他们加压力。
3. But some divers have no extra protection when they watch sharks. A few swim in waters containing food. People drop it in the water to bring fish close to them. 而一些潜水的游客在他们观看鲨鱼的时候没有额外的保护。还有一部分在水里拿着食物。这些人将食物投入水中好让鱼接近他们。
