求翻译：2011年12月9日，星期五下午2:30至3：30。学校要在图书馆501教室举行一次英语讲座。 主讲人，JACKSON 。 内容，现代美国英语。 可以带朋友一起参加，但是不要迟到。是什么意思？

December 9, 2011, Friday 2:30 to 3:30. 501 classrooms in the school library to hold a lecture in English. Speaker, JACKSON. Content, the modern American English. You can join with friends, but do not be late.

December 9, 2011, Friday at 2:30 to 3:30. Schools should hold a meeting in the library 501 classroom English talk. The lecturer, JACKSON. Content, modern American English. They could bring a friend, to participate in, but do not be too late.

On December 9, 2011, Friday in the afternoon 2:30 to 3:30.The school must hold an English course in the library 501 classrooms. Lectures the human, JACKSON. Content, modern US English. May lead the friend to participate together, but do not have to be late.

Friday, December 9, 2011, until 2:30. 501 in the library for school classrooms to hold an English lecture. Speaker, JACKSON. The content, the modern United States English. Bring friends to join, but do not be late.