electroscope
n. [电] 验电器
例句
Her electroscope was a metal case with two holes in its side.
她的验电器是一个金属盒子,旁边有两个小孔。
It was an electroscope which contained a small amount of radium.
这是一个验电器,其中载有少量的镭。
Figure 4-2 a present - day laboratory version of the electroscope.
图4 - 2就是目前实验室里的验电器样式。