There had earlier been a number of explanations suggested for the sinking, including an accidental collision with an unexploded sea mine left over from the Korean War.
早前针对这次舰艇沉没事件有多种解释，包括天安舰与一枚韩战中遗留的未爆水雷意外相撞(引起了沉没)。
So the definition of safety cost is redefined; that is the total expenditure involved in work safety including safety input and accidental loss under the basic safety standard.
为此，笔者重新给出了安全成本的定义：在基准的安全标准下，发生的与安全有关的费用总和，包括安全投入和事故损失两部分。
Including Yangma Island, Kunyu scenic spot admission ticket, food lodging allowance, traffic allowance, civil and military study coach training expense, person accidental insurance premium;
包括养马岛、昆嵛山景点门票、食宿费、交通费、文武学习辅导训练费、人身意外保险费；
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