dielectric constant of vacuum

例句：

1. 1. Thedielectric constant of the materialis crucial for its electrical properties.
   材料的介电常数对其电气性质至关重要。
2. 2.The researcher found that the dielectricconstant of the new material was significantly higherthan that of the previous one.
   研究人员发现，这种新材料的介电常数显著高于之前的材料。
3. 3. The dielectric constantof the vacuum can be used to calculatethe capacitance of a capacitor.
   真空的介电常数可以用来计算电容器的电容。