'Happiness' is a derivative of 'happy'.
happiness是happy的派生词。
Let's sneak in one more derivative here, which is to take the derivative of the derivative.
我们再求一次导数，也就是对导数求导。
The levo-benzhydryl piperazine derivative is expected to become a long-acting effective medicine.
左二苯甲基哌嗪有望成为一种长期有效的药物。
我会计算时间导数。
And then we take the derivative.
然后求导。
“导数”又是什么？
And, not every function has a derivative.
不是每个函数都有导数。
The language is a derivative of plain Rexx.
此语言派生自普通的Rexx。
So, what does the second derivative test say?
那么二阶导数判定是怎样的呢？
Just taking the derivative in the usual way.
以通常的方式求导。
And then, what's the derivative in that direction?
那么，那个方向的导数是什么呢？
The second derivative, they say, is turning positive.
他们说二阶导数转为正值了。
OK, so that's the definition of a partial derivative.
好的，那就是偏导数的定义。
And that is an approximation for partial derivative.
这就是偏导的近似值。
So, it's the second derivative of a position vector.
它是位置向量的二阶导。
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。
That's the first derivative of the position versus time.
它就是位置，对时间的一阶导数。
Rock'n'roll, a blues derivative, was rhythmic dance music.
摇滚衍生于布鲁斯，是一种很有节奏的舞蹈音乐。
It is the derivative of revenue pq with respect to quantity.
它是收入Pq相对于数量的导数。
And that's basically, yes, that's the directional derivative.
基本上是的，那就是方向导数。
Now, if we compare these two, we will get the derivative of h.
比较这两个，我们会得到h的导数。
And angular acceleration is the derivative of angular velocity.
角加速度等于，角速度的导数。
But, it's the usual approximation formula using the derivative.
但都是使用导数的逼近公式。
But, we can still ask, is there a derivative in every direction?
但我们仍想问，是否在每个方向上都有一个导数呢？
Well, it's actually the directional derivative in that direction.
它其实是那个方向的方向导数。
Well, it is given by the derivative of this with respect to u.
它由对u的偏导给出。
Any derivative work, then, gets the benefit of the patent license.
任何衍生产品都因此得益于此专利许可证。
And now we have to take the derivative of this quantity squared.
现在我们要对这个量的平方求导。
And now we have to take the derivative of this quantity squared.
现在我们要对这个量的平方求导。
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