直径 [数] Diameter ; mm ; DIA ; Dimension ; diameter
公称直径 [机] nominal diameter ; DN ; DNNominal ; nominal size
角直径 [数] angular diameter ; angular size
直径标注 DIMDIAMETER
螺杆直径 Screw Diameter ; Diameter of Screw Stem ; mm ; screwdiametermm
角直径距离 Angular Diameter distance
外直径 Outside diameter ; overall diameter ; external diameter ; outer diameter
节圆直径 [机] pitch diameter ; pitch circle diameter ; PBD Pitch Circle Diameter ; PCD
纤维直径 Fibre diameter ; fiber diameter ; Fibre dia ; um
喇叭直径 Speaker Diameter ; Driver Diameter ; mm ; Dirver unit
圆的对称中心线就是直径。
这个穹顶直径为42.3米。
圆周内两直径必相交。
They might be 100 nanometers or so in diameter, whereas, a cell is ten microns or so in diameter.
直径只有一百纳米左右,而一个细胞的直径是十微米左右
And, that's a good thing to know because if you come out with an answer that's somewhere near the diameter of the universe and it's supposed to be the diameter of an atom, then you will know that you probably made a mistake.
这是我们需要知道的,因为当你做一道题得到的答案,是宇宙的直径,而正确答案是原子直径时,你能很快发现你的错误。
In addition, if we compare this to the diameter of an atom, which is on the order of somewhere between one and ten angstroms, now we're seeing that, in fact, this wavelength is significantly larger than its environment.
另外,如果我们把它,与原子的直径相比,原子直径近似1到10埃米之间,我们现在来看看,事实上,这个波长比它所处的环境大很多。
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