送交者: 粪青 于 2009-01-30, 10:15:19:

回答: 小样，美国对世界的贡献-互连网，太空科技，SCIENCE，GPS　。。。 由 meiyou 于 2009-01-30, 09:50:50:

• 我列举的都是无偿的贡献-FREE　FOR　THE　WORLD - meiyou (75 bytes) 2009-01-30, 10:51:11 (296307)
  • I'd say stock market and democracy is the most important American inventions - 粪青 (29 bytes) 2009-01-30, 11:04:08 (296314)
    • Followed by assembly line: which free people from daily manual labor - 粪青 (96 bytes) 2009-01-30, 11:07:02 (296317)

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