n.验电器;
例句:
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.
Figure 4-2 shows 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.
The leaves of the electroscope slowly diverge.
验电器的叶片慢慢张开.