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 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。
Step 3: If the aluminum foil ball is repelled away from the dish, the electroscope works.
步骤三：如果这颗铝箔球和锡箔烤盘彼此排斥，就表示你的验电器成功了。
When the fur is removed from the vicinity of the electroscope , the leaves return to the original angle.
当毛皮从验电器旁边拿走后，金箔又恢复原来的角度。
As there was already pre-charge applied to the electroscope, an additional little charge caused reaction.
由于已经有预充电适用于验电器，额外收取很少引起的反应。
In today's experiment you are going to build an electroscope to measure the static electricity of various household objects.
今天的实验中，你会自己做一个验电器，来测量看看不同的家用品各会产生多少静电。
With the combination of voltage testing and UV-light detecting system, the non-contact UHV electroscope III was successfully developed.
将本课题研究的紫外光检测法应用到特高压验电器的研发中，成功研发出第三代基于紫外脉冲检测法的非接触式特高压验电器。
With the combination of voltage testing and UV-light detecting system, the non-contact UHV electroscope III was successfully developed.
将本课题研究的紫外光检测法应用到特高压验电器的研发中，成功研发出第三代基于紫外脉冲检测法的非接触式特高压验电器。
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