straight-line
/ˈstreɪtˈlaɪn/adjective
1- containing, characterized by, or relating to straight lines or motion in a straight line有直线的; 直线的; 直线运动的：
a straight-line graph
一张直线图表
the Porsche's straight-line stability.
保时捷汽车直线行驶时的平稳性。
1.1
- Finance of or relating to a method of depreciation allocating a given percentage of the cost of an asset each year for a fixed period【财政】（在固定时期内每年给资产一定百分比的）线性折旧的。