片语
first-derivative spectroscopy一阶导数光谱法
First t Derivative Test一阶导数试验法
first directional derivative一阶方向导数
first-derivative reflectance一阶导数反射率
First order derivative spectrophotometry一阶导数分光光度法
first order derivative一次导数
first partial derivative偏导数
first time derivative一阶时间导数