这两种选择都是对系统建模的完全有效的方法,但是到底选择那一个,取决于那一种交互作用是重要的。
Each is a completely valid way of modeling the system, but which we choose depends on which interactions are important.
如果他们没生命,那一个理智的人怎么会选择自我毁灭?
How can otherwise rational people choose self-destruction unless they are diseased?
有那么多“治疗”“药品”和方法可以选择,你怎么就知道你选了对的那一个?
With so many "remedies," "cures" and paths to take, how do you know if you are on the "right" one?
If you're comparing two portfolios with the same expected return, then you want the one with the lower variance.
比较两个有相同预期收益率的投资组合时,你会选择方差小的那一个。
So there's, on campus at least, there's definitely that option. I also...
所以,至少在校园里,那是一个选择。我还……
So you might have chosen a different sentence or whatnot, but that's fine.
所以你们可能选择了一个不同的语句,或其它的东西,但是那挺好的。
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