Our analyst differentiated the revenue function to find how quickly sales were growing in March.

我們的分析師對營收函數求導數，以找出三月銷售成長的速度。

To estimate the shipping cost change per kilometer, the engineer differentiated the pricing formula.

為了估算每公里運費的變化，工程師對定價公式進行微分。

During the finance meeting, she differentiated the cost curve to show the marginal cost at that output.

在財務會議上，她對成本曲線求導數，以呈現該產量下的邊際成本。