You can get this either by implicit differentiation and the product rule, or you could get this just by putting here, here,and here the partial derivatives of this with respect to x, y, and z.
可以通过隐函数微分法和乘法法则得到，或者直接,把关于x，y，z的偏微分放进来。
The company's first product, built in a Palo Alto garage, was an audio oscillator--an electronic test instrument used y sound engineers.
公司的第一个产品是在帕洛阿尔托的车库里生产的，是个声摆，是音响技术员用的电子测试工具。
Our product driven by Y-H Marine motor is approved by China classification society that it is suitable to match with Marine product as a boiler feed pump of for other use.
我厂产品，采用Y - H型船用电机驱动，通过中国船级社形式认可，可与船用产品配套，作为船用泵或船用锅炉给水泵，船用消防泵。
I mixed the product with a little water first, as directed, and then mixed with chocolate milk, and it simply made it more chocolate-y.
我是先混合些水，象说明所说的那些，再加到巧克力牛奶里，很简单方便。
I mixed the product with a little water first, as directed, and then mixed with chocolate milk, and it simply made it more chocolate-y.
我是先混合些水，象说明所说的那些，再加到巧克力牛奶里，很简单方便。
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