求翻译：事实上，我国上市公司普遍存在大股东侵害小股东的现象，不同公司在同一制度和法律框架下其投资者保护状况不尽相同，进而可能影响到公司会计信息质量和绩效。是什么意思？

In fact, the prevalence of large shareholders against small shareholders of listed companies in China, different companies in the same system and its investor protection under the legal framework conditions are different, and thus may affect the company's accounting information quality and performance.