- 问题详情: Most20-year-oldsarestilltryingtofigureoutwhattheywanttodoinlife.BoyanSlatisnotlikethat.Eversincehewas16-yearsold,theDutchteenagerhashadonemission-tocleanupthetrillionsofpiecesofplasticthatarepollutingouroceansandkillingpreciousmarinelife....
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