只有6%的女性曾经计算过一旦她们停止工作，维持现有的生活方式需要多少钱。
Only 6 percent have calculated how much they will need to fund their lifestyle once they stop working.
小姑娘想。因为她的老祖母一个已故去的唯一疼爱她的人，曾经告诉过她，一旦天上落下一颗星，就有一个灵魂回到上帝那里去了。
"Some one is dying," thought the little girl, for her old grandmother, the only one who had ever loved her, and who was now dead, had told her that when a star falls, a soul was going up to God.
曾经，我们都犯过这样的错误，然而一旦您清楚了模型的概念，您就不太可能犯这种错误了。
At one time or another, we all have, but you'll be much less likely to make this error once the model concept is clear in your mind.
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