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。

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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。

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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。

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By default, S3 accounts are set to private, which means these stores of potentially sensitive data had to be flipped to public manually -- most likely by accident.

ENGADGET: Thousands of Amazon S3 data stores left unsecured due to misconfiguration