We cannot use second derivative tests or anything like that.
我们不可以用2阶导数来观察或者别的什么方法。
The actual compound is considered to be a derivative or the parent compound.
把实际化合物看作母体化合物的衍生物。
Do you produce product using pork or pork derivative in your factory?
在工厂生产中用到猪或猪的衍生品吗？
Do you produce product using pork or pork derivative in your factory?
在工厂生产中用到猪或猪的衍生品吗？
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