We want to know whether a given vector field with components P, Q and R can be written as f sub x, f sub y and f sub z for a same function f.
要看向量场,能否写成，其中f是同一个函数。
Namely, let's say that you have a function maybe of three variables, x, y, z, df = fxdx+fydy +fzdz then you would write df equals f sub x dx plus f sub y dy plus f sub z dz.
即是说，如果你有一个,含自变量，x，y，z的函数，那么。
The relationship among three sub-environments and the structure, feature and function of each sub-environment are discussed.
研究了其三个子环境的结构、特点和功能以及相互之间的关系。
The analytic function of GIS was used to inter - process the mining disaster data base and formed three sub - systems. This thesis also analyzed the three sub - systems.
利用G IS特有的分析功能，对矿区灾害数据库进行交互操作，形成了三个子系统，并对它们进行了分析。
The two sub keyboards comprises a digital processing sub keyboard and a function key sub keyboard;
在功能键副键盘的最下方设置有输入法切换键；
The two sub keyboards comprises a digital processing sub keyboard and a function key sub keyboard;
在功能键副键盘的最下方设置有输入法切换键；
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