求翻译：本次活动主要地点为海上，大海神秘莫测，水况复杂，存在相当程度的风险，加之未知的天气、风浪等因素，极易出险，故要求参与活动者必须时刻保有安全第一的心态，坚决服从活动指挥，不得擅自下海游泳，以免发生安全事故。是什么意思？

The major locations for offshore activities, mysterious sea, the water complex conditions, there is a considerable degree of risk, coupled with unknown weather, storms and other factors, can easily escape from danger, and called for participation must always keep safety first mentality, firmly subor

The main venue for activities at sea, the sea water mysterious and complicated situation, there is a considerable degree of risk, and the unknown weather, storms, and other factors, it is very easy for players in the 出险 must, at the first of tenure security mentality, and resolutely obey command, no

This active main place for marine, sea wrapped in a shroud of obscurity, the water situation is complex, the existence suitable degree risk, adds unknown factors and so on weather, storm, extremely easy to escape from danger, therefore requests to participate in the activity having to hold the safet

Main locations for this activity at sea, the sea mystery, complex water conditions, there is a considerable degree of risk, coupled with unknown factors such as weather, waves and is easy for accident, it had requested to participate in activities must at all times keep safety first mind, activities

Main locations for this activity at sea, the sea mystery, complex water conditions, there is a considerable degree of risk, coupled with unknown factors such as weather, waves and is easy for accident, it had requested to participate in activities must at all times keep safety first mind, activities