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1·We take as the second derivative formula.

取作为二次微商计算式。

2·So, what does the second derivative test say?

那么二阶导数判定是怎样的呢？

3·And all we did, further, is take that second derivative.

总而言之，我们所做的就是求二阶导数。

4·So, it's the second derivative of a position vector.

它是位置向量的二阶导。

5·The second derivative, they say, is turning positive.

他们说二阶导数转为正值了。

6·We cannot use second derivative tests or anything like that.

我们不可以用2阶导数来观察或者别的什么方法。

7·I wish I were your second derivative so I could fill your concavities.

我希望我是你的另一个衍生物，那么我就可以填充你的凹陷了。

8·The automatic peak-seeking algorithm was based on the covariance and second derivative.

通过协方差法和二阶求导法实现了光谱峰位的自动检测；

9·Basically, the answer for us is that we don't have a second derivative test in this situation.

基本上，答案就是，我们不可以用二次导数来验证这个情况。

10·This factor has been dubbed the second derivative, or the rate of change of the rate of change.

这一因素被称为是“二阶导数”，或者是变化率的变化率。