How do you keep this good thing going?
你怎样使好的方面一直持续下去?
They've got a good thing going with their travel bureau, why quit now?
他们合伙经营的旅行社进行的很好,为何现在停止了?
Okay, good, so what we're going to do is we're going to differentiate this thing to find a first order condition.
好吧,那我们接下来,对它求导后找出一阶条件
But still, in a way it's kind of like a good thing because you are going to find out more stuff about them,
但是,从某个角度来看,这仍然是件好事,因为你将发现更多关于他们的东西,
So that it's a good thing to be born, " even though your life is going to be followed by death."
所以出生是件好事,尽管你的生命结束之后是死亡“
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