form diameter信息详情
成形直径
diameter───n.直径
inside diameter───[数]内径
outside diameter───外直径；外径
shilling diameter───先令直径
dime diameter───一角直径
pitch diameter───层心直径，（齿轮的）节径，（螺纹的）中径；[机]节圆直径
equatorial diameter───赤道直径（等于12753.44公里）
hydraulic diameter───[机]水力直径；水压直径
diameter definition───直径定义
The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning.───这个通道的直径只有几厘米，但它的宽度足以让电子以闪电这样看得到的形式随着通道到达地面。
During an impact event that creates a crater, central uplifts or mounds form on the floor of the crater in craters larger than 7km in diameter.───在造山活动中，火山口中心地带提升，产生了一个直径约7公里的小型火山口。
do not form a continuous layer, are usually the giants of the forest, reaching heights of 35 to 70 m or more, and trunk sizes of over 2 m in diameter.───不形成连续层的新生植物通常是森林中的巨人，高度可达35至70米或更高，树干直径超过2米。