植物胚胎发育中 的不对称分化建立了两条极性体轴：顶基轴（apical-basal axis）和径向轴（radial axis）。其中，顶基轴区分了根和茎两极；径向轴确定了围绕顶基轴的各层组 织的位置。
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To allow a fibre to vibrate along its radial axis, like the strings on a musical instrument, a more complex architecture is required.
如果要在纤维上达到类似于弦在乐器上围绕其辐射轴振动的效果，科学家们需要更加精密的设计建构。
The radial axis (R-R) traverses a radial line (x) that radially extends from a common axis of rotation (A-A) of the tire (12) and the wheel (14).
所述径向轴(R - R)横过从所述轮胎(12)和车轮(14)的共同的旋转轴(A - A)上径向伸出的径向线(X)。
When an electric field is applied to the electrodes the piezoelectric material translates this into a mechanical strain along its radial axis, causing it to vibrate.
当两个电极之间形成电场时，压电性物质便将电场转化为沿径向轴的机械压力，使纤维震动。
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