我国重大急性职业中毒事故的发生在高危行业、重点毒物和主要岗位有明显的集中趋势；
The trend of the characteristics of severe acute occupational poisoning accidents is centralized in the high risk industries, poisons and jobs.
本文对钻井生产的噪声源进行了分析，同时也对正常钻井作业时的主要岗位点的噪声进行了调查。
The noise sources of drilling production are analysed. The noise from main station of normal drilling work is also investigated in this paper.
服务外包行业的白领阶层的工作岗位正在向印度等主要国家转移。
The necktie class is losing jobs to outsourced service-sector employment, most notably to India.
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