Mr. Wang is a famous doctor.One day he received an invitation to a medical conference. He was happy and accepted it.He got ready for the speech and put the notes into his bag.Then he went there by train.Unfortunately, his bag fell down from the window of the train while the train was running.Mr. Wang was very worried, but he knew the train couldn't stop for him to pick the bag up.

　　王大夫是一位名医。一天他接到一份参加医学大会的邀请函，十分高兴并决定去参加这次大会。他准备在会上发言，并把讲稿装到包里。随后他乘车前往。但不幸的事发生了，他的包在旅途中掉到了车窗外面。王先生十分焦急，但火车不可能停下来，让他去捡包。