Most archaeological sites have been located by means of careful searching, while many others have been discovered by accident.
大多数的考古遗址都是通过仔细的搜寻定位到的，也有许多是偶然发现的。
By means of psychological tests, the differences in attention between accident and non-accident motor vehicle drivers are analyzed.
借助心理测验方法，分析了事故与无事故汽车驾驶员在注意品质方面存在的差异。
On the basis of studying on identification, classification, gradation of gas accident hazard, the structure of coal mine gas accident is analyzed by means of typical accident.
在研究瓦斯危险源辨识方法、分类分级方法的基础上分析煤矿瓦斯危险源系统结构，通过典型事故案例剖析煤矿瓦斯事故危险源系统结构。
An accident simulation was taken as a practical example. Simulation results were showed by means of the chart mode and effective range of the accident can directly be watched.
并给出一个事故模拟应用实例，模拟结果以图表的形式表示出来，可以直观地看出事故的影响范围。
A burst accident of a sand tank, which was used for removing rust by means of spraying on an oil tank, was analyzed, and the prevention countermeasure was provided.
对油罐喷砂除锈过程中发生的一起砂罐爆炸事故进行了剖析，并提出了预防对策。
A burst accident of a sand tank, which was used for removing rust by means of spraying on an oil tank, was analyzed, and the prevention countermeasure was provided.
对油罐喷砂除锈过程中发生的一起砂罐爆炸事故进行了剖析，并提出了预防对策。
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