To get a better handle on this youthful forgetting, scientists studied the brains of young and old rats.

科学家们为了更好的理解这种“年轻的遗忘”现象，他们研究了年轻和年老老鼠的大脑。

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Not only is much of it old and in disrepair, but Brazil's existing infrastructure is too small to handle the volume of people and goods currently using it-let alone accommodate new growth.

除了陈旧、失修之外，巴西基础设施领域还有其 他问题，那就是它们小得无法满足当前的人员及物资使用需求，适应未来增长就更无从谈起了。

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That may explain why 45% of these parents felt that their children would need to be at least 35 years old before they would possess the financial maturity to handle their inheritance.

这可能可以解释为什么45%的父母觉得他们的子女至少必须达到35岁，具备成熟的财产管理能力，才能支配他们的遗产了。

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With Rodriguez's status in doubt, the Yankees picked up 33-year-old Kevin Youkilis to take over at third base and 35-year-old Travis Hafner to handle the designated hitter duties.

WSJ: Yankees putting on Old-Timer's Day all season long

So companies are still wrestling with how to handle old loans and whether the "cashless exercise" of executive stock grants is an illegal loan.

FORBES: The Lending Game

Many who hopped on board the Hogwarts Express for the first time in the late 1990s are now old enough to drive -- and handle adult themes in the books they read.

CNN: Muggle moms await first adult J.K. Rowling book