n.验电器；验电笔

An electroscope detects static electricity by the movement of its leaves.
电光仪通过叶片的移动来检测静电。
The physicist placed a small amount of static charge on the electroscope's metal cap.
物理学家在电光仪的金属帽上放置了一小部分静电。
When a charged object approached the electroscope, the leaves spread apart, indicating a positive charge.
当带电物体靠近电光仪时，叶片张开，表明是正电荷。
The child was fascinated by the way the electroscope reacted to different levels of electrical charge.
那孩子对电光仪对不同电量的反应感到非常着迷。
In a classroom demonstration, the teacher demonstrated the principle of the electroscope using a simple homemade device.
在课堂演示中，老师用一个简易自制的电光仪展示了原理。
The electroscope's sensitivity allowed scientists to measure the minute changes in electric fields around it.
电光仪的灵敏度使科学家能够测量其周围微小的电场变化。
The gold leaf electroscope was a common instrument used in early experiments on electricity.
金箔电光仪是早期关于电学实验中常见的仪器。
After discharging a Leyden jar, the electroscope's leaves immediately regained their original position.
放掉莱顿瓶的电后，电光仪的叶片立即恢复原状。
The invention of the electroscope marked a significant advancement in the understanding of static electricity.
电光仪的发明标志着对静电理解的重大进步。
A lightning strike nearby caused the electroscope's leaves to vibrate, showing that electricity could travel through the air.
附近的一次闪电使得电光仪的叶片振动，表明电能通过空气传播。