When you're young you can't do that, Oswald says.
“当你年轻的时候是不可能做到那样的，”奥斯沃德说。
Mr Oswald says the problem is that the lags are long, with few effects seen for at least 12 months.
Oswald先生认为问题的关键在于影响发生间隔的时间长，至少在12个月内不会有什么明显影响。
Professor Oswald says one possibility is that people recognize their limitations in middle age and give up on some long-held dreams.
奥斯瓦德教授说一种可能的情况是人们在中年认识到他们的缺点， 然后就会放弃那些长时间持续的梦想。
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