因此，在教学中，要突出导数的应用。
Therefore, in the teaching, must highlight the derivative the application.
提出了一种新的NCP函数，并将它应用于自由导数方法，达到了提高算法速度的目的。
The paper gives out a NCP-function; in the paper it is applied to derivative-free method, we can increase the speed of arithmetic.
弹性又称为相对导数，它在商品经济活动中有着广泛的应用，诸如用价格调节需求等。
Elasticity, also called relative derivation, is extensively applied in the activity of commodity economy , such as adjusting the demand with price.
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