first time derivative

常見(jiàn)例句

That's the first derivative of the position versus time.
它就是位置,對(duì)時(shí)間的一堦導(dǎo)數(shù)。
For the first time, derivative distribution of velocity in cell is presented and some new conclusions are obtained.
首次給出了電池內(nèi)的速度導(dǎo)數(shù)分佈，得出了一些新的結(jié)論。
And this, you will recognize is the first derivative of velocity versus time which is also the second derivative of position versus time.
這點(diǎn)想必諸位已經(jīng)了然於胸,它就是速度對(duì),時(shí)間的一堦導(dǎo)數(shù),也是位置對(duì),時(shí)間的二堦導(dǎo)。

From the looks of it ECRI takes the first principle component of these four variables and then charts the first time derivative.
FORBES: On Lakshum Achuthan and ECRI: This is Becoming Embarrassing for Everyone