他们发现那些每天或者每隔一天吃绿叶蔬菜的人，其认知能力与比自己年轻11岁但不吃绿叶蔬菜的人相当。
They found that people who ate one or two daily portions of green leafy vegetables had the same cognitive abilities as someone 11 years younger who never consumed leafy greens.
这是他们的愿望和他们以往的经历，但不是他们的能力。
It is their wish, and their past experience, but not their capacity.
我父亲常常引用的一个信条是：当父母的如果有能力，应该给孩子“足够的财富让他们想干什么就干什么，但不要给太多的财富以至于他们无所事事”。
One of my father's often-quoted tenets is that a parent, if he has the means to do so, should give his children "enough to do anything, but not enough to do nothing. " A head start is fine;
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