求翻译：而随后，国家安监总局政法司新闻宣传处工作人员表示，动车事故书面调查报告尚未形成。至于什么时候调查能结束，工作人员表示尚不清楚。“9月15日”的时间节点系媒体自行理解。是什么意思？

And then, the State Administration of Work Safety Division of Political Press and Information Office staff said motor car accident a written report has not yet formed. As for when the investigation will end, the staff that is not clear. "September 15" on their own time to understand the media node s

Subsequently, the State Administration of Work Safety Supervision and Enforcement Division, said the Press and Information Office staff car accident investigation report writing has yet to take shape. As for when it can be concluded that the staff said it is still not clear. " " On 15 September, the

But afterwards, the National Peaceful Jail Bureau Politics and law Department news propaganda section staff indicated that, moves the vehicle accident written report of investigation not yet the formation.When as for investigates can finish, the staff expressed not not clearly still.“On September 15

Subsequently, State administration of safety supervision of politics and law news and propaganda branch of the Division staff, motor car accident in writing investigation report has not yet been formed. When investigations can end, the staff said it was not clear. "September 15" node of the media on

Subsequently, State administration of safety supervision of politics and law news and propaganda branch of the Division staff, motor car accident in writing investigation report has not yet been formed. When investigations can end, the staff said it was not clear. "September 15" node of the media on