The galvanometer is placed on a leaf off the plant, and it records any changes in the electrical field of the leaf.

把检流检置于已从植物上脱落的叶片上，它就可以记录叶片的电场中的任何电荷。

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According to circuit principle of the experiment of measuring magnetic field in straight solenoid by impact galvanometer, theory analysis on reducing system error is done by using numerical method.

根据冲击电流计测直螺线管磁场的实验电路原理，利用数值计算方法，对减少测量的系统误差进行了理论分析。

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Henry signalled his assistant to disconnect the coil. The galvanometer showed that once again a voltage had been produced, although this time in the opposite direction.

亨利示意他的助手将线圈断开连接，此时，电流计上又一次指示出一个电压，但这次的电压是反向的。

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