METHODS: The first order derivative spectrophotometry was used.

方法：采用一阶导数分光光度法。

youdao

In this equation, the diffusion is a fractional order derivative of time and space.

在此方程中，弥散项和对时间的导数为分数阶导数所代替。

youdao

The content of etoposide injection was determined by first order derivative spectrophotometry.

用一阶导数光谱法测定足叶乙甙注射液的含量。

youdao

And all this is, is saying that when you take a mixed second derivative, it doesn't matter in which order you take the two derivatives.

麦克斯韦关系的本质是,当你考虑混合的二阶导数时，求导的顺序不影响最后的结果,现在，我们利用这些关系。

麻省理工公开课 - 热力学与动力学课程节选

I take a look at the second derivative, which is the second order condition.

我需要求出二阶导数,即需要寻找二阶条件

耶鲁公开课 - 博弈论课程节选

And the point is that the second derivative of A, with respect to V and T in this order is the same as the second derivative of a with respect to T and V in this order.

问题的关键在于A的二阶导数，对V和T以这样一个顺序求导,和对T和V以这样一个顺序,求导是一样的。

麻省理工公开课 - 热力学与动力学课程节选

In order to ensure device anonymity, the Bluetooth sensors only send a derivative of each device's MAC address to the bridge's main controller, so consider this a Bluesnarfing safe-zone.

ENGADGET: This week only, London's Tower Bridge is the world's largest Bluetooth device