请教一些美国文学的相关概念，望有智者慷慨相助

上学期考过。。。这学期资料都没了，还有一点，给你参考吧。

What Is Lost Generation?
 The term “Lost Generation” came from Gertrude Stein, who had a salon in her house for English and American expatriates in Paris. The Phrase was a remark she made to a mechanic in Hemingway’s presence that “You are all a lost generation.”
 It was used by Ernest Hemingway as a motto in his novel The Sun Also Rises, whose hero, the emasculated Jack Barnes, is often considered the archetypal man of the generation.
 It is widely applied to young English and American expatriates as well men and women caught in the war and cut off from the old values and yet unable to come to terms with the new era when civilization had gone mad.
 They aimlessly wandered about the Continent, drinking, making love, and traveling from place to place and from party to party.
 These activities seem to justify their search for new meaning to replace the old ones. Yet in fact, the