Because of my carelessness, I lost my school bag after I studied in the library last Saturday afternoon.I am not sure whether I lost it in the library or on the way back to the dormitory.It's red. There are some textbooks and notebooks in it, including those for mathematics, physics, chemistry, geography, Chinese, English and so on.If anyone has found it, please send it to Li Hong, Class 2, Grade 3, or to Room 506, Dormitory 2.The owner will be very thankful.

　　因为我的疏忽，我上星期六下午在图书馆学习后把书包丢了。我不清楚是丢在图书馆，还是丢在回宿舍的路上。包是红色的，里面有课本和笔记本，包括数学、物理、化学、语文、英语等课本。如果有人找到，请送给三年级二班李红，或者送到二号宿舍楼506室。本人不胜感激。