这是个典故,bee是一个竞赛,The National Spelling Bee 的简写。
The National Spelling Bee was formed in 1925 as a consolidation of numerous local spelling bees, organized by the Louisville Courier-Journal and having nine competitors. Later, the E.W. Scripps Company acquired the rights to the program. The bee is held in late May and/or early June of each year, and is open to students who have not yet completed the eighth grade, reached their 16th birthday, nor won a previous National Spelling Bee. Its goal is educational: not only to encourage children to perfect the art of spelling, but also to help enlarge their vocabularies and widen their knowledge of the English language.
An insect bee is featured prominently on the logo of the Scripps National Spelling Bee. The origin of the word "bee" as used in "spelling bee" is unclear. "Bee" refers to "a gathering", where people join together in an activity[1]. While the similarity between these human social gatherings and the social nature of bees is evident, recent thinking is that the origin of this sense of "bee" is related to the word "been"
参考资料:http://encyclopedia.thefreedictionary.com/National+Spelling+Bee