first-derivative spectroscopy一阶导数光谱法

first-derivative reflectance一阶导数反射率

First t Derivative Test一阶导数试验法

First-derivative一阶导数

first partial derivative偏导数

First order derivative spectrophotometry一阶导数分光光度法

first order derivative一阶导数

first time derivative一阶时间导数;一次微商心室最大压力随时间变化率

first directional derivative一阶方向导数