![ScienceDaily—Americanteensareconfidenttheycaninventsolu...]( "ScienceDaily—Americanteensareconfidenttheycaninventsolu...")
- 问题详情：ScienceDaily—Americanteensareconfidenttheycaninventsolutionstosomeoftheworld'spressingchallenges，suchasprotectingandrestoringthenaturalenvironment，butmorethanhalffeelunpreparedforcareersintechnologyandengineering，theLemelson-MITInventionIndexh...
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