直经的英文：
【医】 diameter
- He has been suffered from recurrent bouts of depression.
他一直经受着反复发作抑郁症的折磨。
n. 直径；放大率；放大倍数
- The bolt has a diameter of 1cm.
螺栓直径为1厘米。 - Please measure the diameter of this circle.
请量一下这圆的直径。 - Its diameter is 8 m.
它的直径是8米。 - The difference in a given firearm between the diameter of the projectile fired and the diameter of the bore of the firearm.
游隙某一特定火器枪弹的直径与火器镗孔的直径之间的差异 - This lens can magnify 20 diameter.
这个透镜能放大20倍。