Objective To know the present epidemiological situation of drowning-related risk behaviors of Chinese adolescents and to provide basis for drowing injury prevention and control .
目的了解中国青少年溺水相关健康危险行为的流行状况，为进一步制定相关伤害的预防和控制提供依据。
Their swimming safety awareness is relatively good , their right ratio of choosing the right place to swim is high , their drowing rescue methods are much better .
游泳安全意识相对较好，对游泳地点选择正确率较高，对游泳时发生溺水的施救方法掌握较好。
There has long been a superstition among mariners that porpoises will save drowing men by pushing them to the surface , or protect them from sharks by surrounding them in defensive formation .
