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励志动机：智慧之言和榜样
Man Born Without Hands or Feet Had Determination and Overcame Countless Rejections to Become a Commercial Pilot and Flight Instructor
Unsung Heros (Over Past 75 Years) Paved Way for
1st African American Secretary of Defense
& Today's Historic Record of Generals/Admirals
哈佛研究 - 成功的三个步骤！
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