介绍一个实用的晶体管开关电路，用它能够较准确地测定电容和介电常量。
A practicable transistor on-off circuit is presented which can measure capacitance and dielectric constant accurately.
介绍了介电特性的基本概念、主要参数和测定方法及其在水果和谷物品质检测分析中的应用。
Essential idea, parameters, inspection method of dielectric properties and its application in the determination and analysis of quality of fruit and corn were introduced in the paper.
合成了几种具有大介电各向异性和小弹性常数的线性多烯化合物，并对其物理性质进行了测定。
Several linear polyene compounds with extraordinarily large dielectric anisotropy and small elastic constant were synthesized and their physical properties evaluated.
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