The engineer drew a tangent to the curve to show the projected sales growth rate.

工程師在曲線上畫了一條切線，用來顯示預估的銷售成長率。

In the finance meeting, the analyst used a tangent on the chart to explain the trend.

在財務會議上，分析師利用圖表上的切線來說明趨勢。

The shipping route follows a tangent to the coastline before turning toward the port.

這條航運路線先沿著海岸線的切線前進，再轉向港口。