在当前制度和市场环境下，我国民营上市公司的第二类代理问题比较严重。
Under the current institutional and market condition, the second agency problem is very serious in Chinese listed private-controlled companies.
第三条根据放射性物品的特性及其对人体健康和环境的潜在危害程度，将放射性物品分为一类、二类和三类。
Article 3 the radioactive articles shall be classified into Categories I, II and III according to their characteristics and their extent of potential hazard to human health and environment.
本文阐述了生态平衡下，森林采伐如何进行。森林资源划分为三大类：第一类是环境资源林；第二类是工业人工林；
Under protecting ecological balance, the authors of this paper present that forest resources are divided into three parts: environment forest, industrial forest and mountain conprehensive forest.
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