Two ¾«Æ·SMÔÚÏßӰƬ undergraduate student teams have been named among the 11 top winners from a field of 5,636 teams that entered the 2013 international Mathematical Contest in Modeling this spring. Only 375 teams, or 6 percent of those entering the contest, were from the United States. The others were from Canada, China, Finland, Germany, Hong Kong, India, Indonesia, Ireland, Mexico, Malaysia, Singapore, South Korea, Sweden and the United Kingdom.