By the end of 2001, China had set up 3,174 labor security supervision organs, with 40,000 labor security supervisors.是什么意思_By the end of 2001, China had set up 3,174 labor security supervision organs, with 40,000 labor security supervisors.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句