Now you are telling me you want to send me somewhere were I don't know nobody.
VOA: standard.2010.03.29
I would say, okay, this guy wants me to find a function which reduces to the number a when I take two derivatives, and I know somewhere here, this result, which says that when I take a derivative, I lose a power of t.
出题者想要我找出一个函数,它在经过两次求导后得到数字a,我知道这里的某个地方,这个结论告诉我,我每求一次导,t就降一次幂
If I know I'm going to need something over and over again, I squirrel it away somewhere and then get it back when I need it.
如果我知道我将要反复,使用一个东西时,我会把它贮藏起来以后用。
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