It must have taken me a half hour to sense that maybe some key to an answer could result from reversing the word "Thanksgiving" — at least that suggested a verbal direction, "giving thanks."
大概过了半个小时左右我才意识到，问题的关键也许在于把Thanksgiving这个字前后颠倒一下——那样一来至少文字好懂了：giving thanks。
But let me just tell you immediately to the side, which side it's pointing to it's always pointing towards higher values of a function OK, and we'll see in that maybe about half an hour.
现在我可以告诉你，它总是，指向更大的函数值的方向，可能半个小时后就会知道为何了。
Just walk, at a reasonably vigorous clip (3 m. p. h. - 4 m. p. h.) for half an hour or so, maybe five or six times a week.
就以适度有力的步伐(每小时3 ~4英里)走上半个小时左右，每周五六次。
Just walk, at a reasonably vigorous clip (3 m. p. h. - 4 m. p. h.) for half an hour or so, maybe five or six times a week.
就以适度有力的步伐(每小时3 ~4英里)走上半个小时左右，每周五六次。
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