求翻译：上市公司的董事会在法律上是企业的最高权力机构,应在监督经营者方面起重要作用, 但在实践中却并非如此。据一项研究表明: 在我国上市公司董事会成员中,100% 为内部董事的公司占有效样本的22.1% , 50% 以上为内部董事的公司占有效样本的78.2% , 董事长和总经理一人兼任的公司占样本数的47.7% , 由此可见, 公司董事会很大程度上掌握在内部人手中企业对经营者的内部约束机制相对弱化, 经营者实际控制着企业, 在这种情况下,外部约束机制尤其是资本市场对经营者的约束便显得非常重要了。是什么意思？

The board of directors of listed companies in the law is the highest authority, should play an important role in the oversight of operators, but in practice is not the case.据一项研究表明: 在我国上市公司董事会成员中,100% 为内部董事的公司占有效样本的22.1% , 50% 以上为内部董事的公司占有效样本的78.2% , 董事长和总经理一人兼任companies accounted for 47.7% of the n

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Listed company's Board is the highest authority of the enterprise by law, should play a significant role in monitoring the operator, but in practice it is not. According to a items research indicates that: in in China listed company Board members in the, 100% for internal Director of company account