The analyst calculated the differential of the cost curve to find the marginal cost per unit.

分析師計算成本曲線的導數，以求出每單位的邊際成本。

Our finance team used the differential to estimate how revenue changes with each price increase.

我們的財務團隊利用導數來估算每次調漲價格時營收的變化。

During the training session, the consultant explained how a differential shows the rate of change in shipping costs.

在培訓課程中，顧問說明了導數如何呈現運費的變化率。