vertical-axis的用法和樣例：
例句
- Reflection will fall within a narrow wedge on the plot that is centered on its vertical axis.
反射波落在圖上以垂直軸為中心的一個狹窄的楔狀帶內。 - In order for a gyrocompass to be accurate it is obviously necessary to hold spurious vertical torques to an extremely low level.
為了使陀螺羅盤做得準確，很明顯有必要使垂直軸干擾力矩減小到很低。
